x/mobile: init fails

[akabos]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go version go1.7.3 darwin/amd64

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/akabos/Library/Go:/Users/akabos/Go"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/km/z6nl8hj561qfzcbqsq4ypq040000gn/T/go-build815976363=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"

What did you do?

go get -u golang.org/x/mobile/cmd/gomobile
gomobile init

What did you expect to see?

Expected no output and exit code 0.

What did you see instead?

gomobile: go install golang.org/x/mobile/app failed: exit status 2
# golang.org/x/mobile/app
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:28:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *nonBaseCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:29:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *alphanumericCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:30:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decomposableCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:31:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *illegalCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:32:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *punctuationCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:33:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *capitalizedLetterCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:34:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *symbolCharacterSet;
                     ^
/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:35:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *newlineCharacterSet NS_AVAILABLE(10_5, 2_0);
                     ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:20:
/System/Library/Frameworks/Foundation.framework/Headers/NSDateFormatter.h:70:12: error: unknown property attribute 'class'
@property (class) NSDateFormatterBehavior defaultFormatterBehavior;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:26:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSMeasurement.h:8:
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:133:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAcceleration *metersPerSecondSquared;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:134:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAcceleration *gravity;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:144:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAngle *degrees;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:145:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAngle *arcMinutes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:146:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAngle *arcSeconds;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:147:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAngle *radians;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:148:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAngle *gradians;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:149:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitAngle *revolutions;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:159:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareMegameters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:160:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareKilometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:161:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareMeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:162:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareCentimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:163:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareMillimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:164:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareMicrometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:165:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareNanometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:166:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareInches;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:167:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareFeet;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:168:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareYards;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:169:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *squareMiles;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:170:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *acres;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:171:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *ares;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:172:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitArea *hectares;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:182:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitConcentrationMass *gramsPerLiter;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:183:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitConcentrationMass *milligramsPerDeciliter;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:194:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitDispersion *partsPerMillion;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:204:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitDuration *seconds;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:205:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitDuration *minutes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:206:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitDuration *hours;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:216:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCharge *coulombs;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:217:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCharge *megaampereHours;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:218:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCharge *kiloampereHours;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:219:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCharge *ampereHours;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:220:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCharge *milliampereHours;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:221:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCharge *microampereHours;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:231:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCurrent *megaamperes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:232:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCurrent *kiloamperes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:233:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCurrent *amperes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:234:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCurrent *milliamperes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:235:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricCurrent *microamperes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:245:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricPotentialDifference *megavolts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:246:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricPotentialDifference *kilovolts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:247:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricPotentialDifference *volts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:248:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricPotentialDifference *millivolts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:249:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricPotentialDifference *microvolts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:259:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricResistance *megaohms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:260:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricResistance *kiloohms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:261:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricResistance *ohms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:262:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricResistance *milliohms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:263:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitElectricResistance *microohms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:273:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitEnergy *kilojoules;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:274:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitEnergy *joules;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:275:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitEnergy *kilocalories;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:276:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitEnergy *calories;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:277:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitEnergy *kilowattHours;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:287:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *terahertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:288:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *gigahertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:289:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *megahertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:290:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *kilohertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:291:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *hertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:292:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *millihertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:293:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *microhertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:294:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFrequency *nanohertz;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:304:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFuelEfficiency *litersPer100Kilometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:305:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFuelEfficiency *milesPerImperialGallon;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:306:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitFuelEfficiency *milesPerGallon;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:316:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *megameters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:317:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *kilometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:318:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *hectometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:319:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *decameters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:320:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *meters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:321:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *decimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:322:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *centimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:323:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *millimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:324:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *micrometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:325:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *nanometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:326:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *picometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:327:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *inches;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:328:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *feet;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:329:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *yards;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:330:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *miles;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:331:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *scandinavianMiles;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:332:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *lightyears;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:333:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *nauticalMiles;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:334:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *fathoms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:335:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *furlongs;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:336:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *astronomicalUnits;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:337:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitLength *parsecs;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:347:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitIlluminance *lux;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:357:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *kilograms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:358:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *grams;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:359:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *decigrams;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:360:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *centigrams;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:361:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *milligrams;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:362:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *micrograms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:363:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *nanograms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:364:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *picograms;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:365:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *ounces;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:366:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *poundsMass;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:367:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *stones;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:368:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *metricTons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:369:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *shortTons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:370:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *carats;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:371:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *ouncesTroy;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:372:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitMass *slugs;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:382:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *terawatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:383:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *gigawatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:384:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *megawatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:385:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *kilowatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:386:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *watts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:387:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *milliwatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:388:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *microwatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:389:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *nanowatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:390:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *picowatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:391:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *femtowatts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:392:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPower *horsepower;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:402:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *newtonsPerMetersSquared;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:403:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *gigapascals;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:404:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *megapascals;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:405:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *kilopascals;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:406:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *hectopascals;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:407:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *inchesOfMercury;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:408:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *bars;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:409:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *millibars;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:410:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *millimetersOfMercury;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:411:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitPressure *poundsForcePerSquareInch;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:421:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitSpeed *metersPerSecond;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:422:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitSpeed *kilometersPerHour;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:423:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitSpeed *milesPerHour;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:424:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitSpeed *knots;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:433:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitTemperature *kelvin;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:434:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitTemperature *celsius;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:435:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitTemperature *fahrenheit;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:446:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *megaliters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:447:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *kiloliters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:448:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *liters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:449:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *deciliters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:450:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *centiliters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:451:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *milliliters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:452:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicKilometers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:453:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicMeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:454:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicDecimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:455:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicCentimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:456:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicMillimeters;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:457:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicInches;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:458:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicFeet;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:459:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicYards;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:460:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cubicMiles;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:461:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *acreFeet;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:462:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *bushels;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:463:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *teaspoons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:464:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *tablespoons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:465:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *fluidOunces;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:466:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *cups;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:467:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *pints;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:468:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *quarts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:469:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *gallons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:470:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *imperialTeaspoons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:471:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *imperialTablespoons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:472:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *imperialFluidOunces;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:473:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *imperialPints;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:474:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *imperialQuarts;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:475:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *imperialGallons;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSUnit.h:476:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSUnitVolume *metricCups;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:27:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSMeasurementFormatter.h:11:
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:83:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSLocale *autoupdatingCurrentLocale NS_AVAILABLE(10_5, 2_0); // generally you should use this property
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:85:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSLocale *currentLocale;      // an object representing the user's current locale
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:86:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSLocale *systemLocale;       // the default generic root locale with little localization
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:98:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *availableLocaleIdentifiers;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:99:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *ISOLanguageCodes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:100:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *ISOCountryCodes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:101:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *ISOCurrencyCodes;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:102:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *commonISOCurrencyCodes NS_AVAILABLE(10_5, 2_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSLocale.h:104:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *preferredLanguages NS_AVAILABLE(10_5, 2_0); // note that this list does not indicate what language the app is actually running in; the NSBundle.mainBundle object determines that at launch and knows that information
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:31:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSDecimalNumber.h:9:
/System/Library/Frameworks/Foundation.framework/Headers/NSException.h:297:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSAssertionHandler *currentHandler;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:31:
/System/Library/Frameworks/Foundation.framework/Headers/NSDecimalNumber.h:65:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDecimalNumber *zero;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSDecimalNumber.h:66:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDecimalNumber *one;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSDecimalNumber.h:67:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDecimalNumber *minimumDecimalNumber;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSDecimalNumber.h:68:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDecimalNumber *maximumDecimalNumber;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSDecimalNumber.h:69:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDecimalNumber *notANumber;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSDecimalNumber.h:98:12: error: unknown property attribute 'class'
@property (class, strong) id <NSDecimalNumberBehaviors> defaultBehavior;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:36:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSFileHandle.h:10:
/System/Library/Frameworks/Foundation.framework/Headers/NSRunLoop.h:27:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSRunLoop *currentRunLoop;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSRunLoop.h:28:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSRunLoop *mainRunLoop NS_AVAILABLE(10_5, 2_0);
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:36:
/System/Library/Frameworks/Foundation.framework/Headers/NSFileHandle.h:41:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSFileHandle *fileHandleWithStandardInput;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSFileHandle.h:42:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSFileHandle *fileHandleWithStandardOutput;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSFileHandle.h:43:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSFileHandle *fileHandleWithStandardError;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSFileHandle.h:44:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSFileHandle *fileHandleWithNullDevice;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:37:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSFileManager.h:11:
/System/Library/Frameworks/Foundation.framework/Headers/NSURL.h:512:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCharacterSet *URLUserAllowedCharacterSet NS_AVAILABLE(10_9, 7_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSURL.h:515:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCharacterSet *URLPasswordAllowedCharacterSet NS_AVAILABLE(10_9, 7_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSURL.h:518:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCharacterSet *URLHostAllowedCharacterSet NS_AVAILABLE(10_9, 7_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSURL.h:521:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCharacterSet *URLPathAllowedCharacterSet NS_AVAILABLE(10_9, 7_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSURL.h:524:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCharacterSet *URLQueryAllowedCharacterSet NS_AVAILABLE(10_9, 7_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSURL.h:527:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCharacterSet *URLFragmentAllowedCharacterSet NS_AVAILABLE(10_9, 7_0);
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:37:
/System/Library/Frameworks/Foundation.framework/Headers/NSFileManager.h:94:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSFileManager *defaultManager;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:41:
/System/Library/Frameworks/Foundation.framework/Headers/NSHTTPCookieStorage.h:60:11: error: unknown property attribute 'class'
@property(class, readonly, strong) NSHTTPCookieStorage *sharedHTTPCookieStorage;
          ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:46:
/System/Library/Frameworks/Foundation.framework/Headers/NSKeyValueCoding.h:45:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL accessInstanceVariablesDirectly;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:54:
/System/Library/Frameworks/Foundation.framework/Headers/NSNotificationQueue.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationQueue *defaultQueue;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:58:
/System/Library/Frameworks/Foundation.framework/Headers/NSOperation.h:140:12: error: unknown property attribute 'class'
@property (class, readonly, strong, nullable) NSOperationQueue *currentQueue NS_AVAILABLE(10_6, 4_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSOperation.h:141:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSOperationQueue *mainQueue NS_AVAILABLE(10_6, 4_0);
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:65:
/System/Library/Frameworks/Foundation.framework/Headers/NSProcessInfo.h:39:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSProcessInfo *processInfo;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:77:
/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:20:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSThread *currentThread;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:43:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSNumber *> *callStackReturnAddresses NS_AVAILABLE(10_5, 2_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:44:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *callStackSymbols NS_AVAILABLE(10_6, 4_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:53:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL isMainThread NS_AVAILABLE(10_5, 2_0); // reports whether current thread is main
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:53:34: error: property has a previous declaration
@property (class, readonly) BOOL isMainThread NS_AVAILABLE(10_5, 2_0); // reports whether current thread is main
                                 ^
/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:51:27: note: property declared here
@property (readonly) BOOL isMainThread NS_AVAILABLE(10_5, 2_0);
                          ^
/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:54:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSThread *mainThread NS_AVAILABLE(10_5, 2_0);
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:78:
/System/Library/Frameworks/Foundation.framework/Headers/NSTimeZone.h:29:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSTimeZone *systemTimeZone;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSTimeZone.h:34:12: error: unknown property attribute 'class'
@property (class, copy) NSTimeZone *defaultTimeZone;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSTimeZone.h:36:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSTimeZone *localTimeZone;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSTimeZone.h:38:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSString *> *knownTimeZoneNames;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSTimeZone.h:40:12: error: unknown property attribute 'class'
@property (class, copy) NSDictionary<NSString *, NSString *> *abbreviationDictionary NS_AVAILABLE(10_6, 4_0);
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSTimeZone.h:44:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSString *timeZoneDataVersion NS_AVAILABLE(10_6, 4_0);
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:83:
/System/Library/Frameworks/Foundation.framework/Headers/NSURLCache.h:153:12: error: unknown property attribute 'class'
@property (class, strong) NSURLCache *sharedURLCache;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:86:
/System/Library/Frameworks/Foundation.framework/Headers/NSURLCredentialStorage.h:38:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSURLCredentialStorage *sharedCredentialStorage;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:90:
/System/Library/Frameworks/Foundation.framework/Headers/NSURLRequest.h:201:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:92:
/System/Library/Frameworks/Foundation.framework/Headers/NSUserDefaults.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSUserDefaults *standardUserDefaults;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:112:
/System/Library/Frameworks/Foundation.framework/Headers/NSFileCoordinator.h:107:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<id<NSFilePresenter>> *filePresenters;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:125:
/System/Library/Frameworks/Foundation.framework/Headers/NSURLSession.h:129:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSURLSession *sharedSession;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSURLSession.h:484:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSURLSessionConfiguration *defaultSessionConfiguration;
           ^
/System/Library/Frameworks/Foundation.framework/Headers/NSURLSession.h:485:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSURLSessionConfiguration *ephemeralSessionConfiguration;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:16:
In file included from /System/Library/Frameworks/Carbon.framework/Headers/Carbon.h:29:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/HIToolbox.h:240:
In file included from /System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/IMKInputSession.h:23:
In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:178:
/System/Library/Frameworks/Foundation.framework/Headers/NSUserNotification.h:123:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSUserNotificationCenter *defaultUserNotificationCenter;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSGraphicsContext.h:9:
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:59:86: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeClear API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationClear", macosx(10.0, 10.12)) = NSCompositingOperationClear;
                                                                                     ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:60:85: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeCopy API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationCopy", macosx(10.0, 10.12)) = NSCompositingOperationCopy;
                                                                                    ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:61:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeSourceOver API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationSourceOver", macosx(10.0, 10.12)) = NSCompositingOperationSourceOver;
                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:62:89: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeSourceIn API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationSourceIn", macosx(10.0, 10.12)) = NSCompositingOperationSourceIn;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:63:90: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeSourceOut API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationSourceOut", macosx(10.0, 10.12)) = NSCompositingOperationSourceOut;
                                                                                         ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:64:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeSourceAtop API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationSourceAtop", macosx(10.0, 10.12)) = NSCompositingOperationSourceAtop;
                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:65:96: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeDestinationOver API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationDestinationOver", macosx(10.0, 10.12)) = NSCompositingOperationDestinationOver;
                                                                                               ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:66:94: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeDestinationIn API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationDestinationIn", macosx(10.0, 10.12)) = NSCompositingOperationDestinationIn;
                                                                                             ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:67:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeDestinationOut API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationDestinationOut", macosx(10.0, 10.12)) = NSCompositingOperationDestinationOut;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:68:96: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeDestinationAtop API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationDestinationAtop", macosx(10.0, 10.12)) = NSCompositingOperationDestinationAtop;
                                                                                               ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:69:84: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeXOR API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationXOR", macosx(10.0, 10.12)) = NSCompositingOperationXOR;
                                                                                   ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:70:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositePlusDarker API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationPlusDarker", macosx(10.0, 10.12)) = NSCompositingOperationPlusDarker;
                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:72:92: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositePlusLighter API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationPlusLighter", macosx(10.0, 10.12)) = NSCompositingOperationPlusLighter;
                                                                                           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:73:89: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeMultiply API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationMultiply", macosx(10.0, 10.12)) = NSCompositingOperationMultiply;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:74:87: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeScreen API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationScreen", macosx(10.0, 10.12)) = NSCompositingOperationScreen;
                                                                                      ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:75:88: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeOverlay API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationOverlay", macosx(10.0, 10.12)) = NSCompositingOperationOverlay;
                                                                                       ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:76:87: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeDarken API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationDarken", macosx(10.0, 10.12)) = NSCompositingOperationDarken;
                                                                                      ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:77:88: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeLighten API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationLighten", macosx(10.0, 10.12)) = NSCompositingOperationLighten;
                                                                                       ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:78:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeColorDodge API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationColorDodge", macosx(10.0, 10.12)) = NSCompositingOperationColorDodge;
                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:79:90: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeColorBurn API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationColorBurn", macosx(10.0, 10.12)) = NSCompositingOperationColorBurn;
                                                                                         ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:80:90: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeSoftLight API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationSoftLight", macosx(10.0, 10.12)) = NSCompositingOperationSoftLight;
                                                                                         ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:81:90: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeHardLight API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationHardLight", macosx(10.0, 10.12)) = NSCompositingOperationHardLight;
                                                                                         ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:82:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeDifference API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationDifference", macosx(10.0, 10.12)) = NSCompositingOperationDifference;
                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:83:90: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeExclusion API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationExclusion", macosx(10.0, 10.12)) = NSCompositingOperationExclusion;
                                                                                         ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:85:84: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeHue API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationHue", macosx(10.0, 10.12)) = NSCompositingOperationHue;
                                                                                   ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:86:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeSaturation API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationSaturation", macosx(10.0, 10.12)) = NSCompositingOperationSaturation;
                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:87:86: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeColor API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationColor", macosx(10.0, 10.12)) = NSCompositingOperationColor;
                                                                                     ^
/System/Library/Frameworks/AppKit.framework/Headers/NSGraphics.h:88:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSCompositingOperation NSCompositeLuminosity API_DEPRECATED_WITH_REPLACEMENT("NSCompositingOperationLuminosity", macosx(10.0, 10.12)) = NSCompositingOperationLuminosity;
                                                                                          ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:15:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSActionCell.h:8:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSCell.h:11:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSText.h:8:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSView.h:8:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSApplication.h:10:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSResponder.h:10:
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:65:75: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSLeftMouseDown        API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeLeftMouseDown", macosx(10.0, 10.12)) = NSEventTypeLeftMouseDown;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:66:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSLeftMouseUp          API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeLeftMouseUp", macosx(10.0, 10.12)) = NSEventTypeLeftMouseUp;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:67:76: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSRightMouseDown       API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeRightMouseDown", macosx(10.0, 10.12)) = NSEventTypeRightMouseDown;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:68:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSRightMouseUp         API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeRightMouseUp", macosx(10.0, 10.12)) = NSEventTypeRightMouseUp;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:69:73: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSMouseMoved           API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeMouseMoved", macosx(10.0, 10.12)) = NSEventTypeMouseMoved;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:70:77: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSLeftMouseDragged     API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeLeftMouseDragged", macosx(10.0, 10.12)) = NSEventTypeLeftMouseDragged;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:71:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSRightMouseDragged    API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeRightMouseDragged", macosx(10.0, 10.12)) = NSEventTypeRightMouseDragged;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:72:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSMouseEntered         API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeMouseEntered", macosx(10.0, 10.12)) = NSEventTypeMouseEntered;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:73:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSMouseExited          API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeMouseExited", macosx(10.0, 10.12)) = NSEventTypeMouseExited;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:74:70: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSKeyDown              API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeKeyDown", macosx(10.0, 10.12)) = NSEventTypeKeyDown;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:75:68: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSKeyUp                API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeKeyUp", macosx(10.0, 10.12)) = NSEventTypeKeyUp;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:76:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSFlagsChanged         API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeFlagsChanged", macosx(10.0, 10.12)) = NSEventTypeFlagsChanged;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:77:75: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSAppKitDefined        API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeAppKitDefined", macosx(10.0, 10.12)) = NSEventTypeAppKitDefined;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:78:75: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSSystemDefined        API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeSystemDefined", macosx(10.0, 10.12)) = NSEventTypeSystemDefined;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:79:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSApplicationDefined   API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeApplicationDefined", macosx(10.0, 10.12)) = NSEventTypeApplicationDefined;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:80:71: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSPeriodic             API_DEPRECATED_WITH_REPLACEMENT("NSEventTypePeriodic", macosx(10.0, 10.12)) = NSEventTypePeriodic;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:81:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSCursorUpdate         API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeCursorUpdate", macosx(10.0, 10.12)) = NSEventTypeCursorUpdate;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:82:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSScrollWheel          API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeScrollWheel", macosx(10.0, 10.12)) = NSEventTypeScrollWheel;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:83:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSTabletPoint          API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeTabletPoint", macosx(10.0, 10.12)) = NSEventTypeTabletPoint;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:84:77: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSTabletProximity      API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeTabletProximity", macosx(10.0, 10.12)) = NSEventTypeTabletProximity;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:85:75: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSOtherMouseDown       API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeOtherMouseDown", macosx(10.0, 10.12)) = NSEventTypeOtherMouseDown;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:86:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSOtherMouseUp         API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeOtherMouseUp", macosx(10.0, 10.12)) = NSEventTypeOtherMouseUp;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:87:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventType NSOtherMouseDragged    API_DEPRECATED_WITH_REPLACEMENT("NSEventTypeOtherMouseDragged", macosx(10.0, 10.12)) = NSEventTypeOtherMouseDragged;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:135:80: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSLeftMouseDownMask            API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskLeftMouseDown", macosx(10.0, 10.12)) = NSEventMaskLeftMouseDown;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:136:78: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSLeftMouseUpMask              API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskLeftMouseUp", macosx(10.0, 10.12)) = NSEventMaskLeftMouseUp;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:137:81: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSRightMouseDownMask           API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskRightMouseDown", macosx(10.0, 10.12)) = NSEventMaskRightMouseDown;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:138:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSRightMouseUpMask             API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskRightMouseUp", macosx(10.0, 10.12)) = NSEventMaskRightMouseUp;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:139:77: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSMouseMovedMask               API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskMouseMoved", macosx(10.0, 10.12)) = NSEventMaskMouseMoved;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:140:82: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSLeftMouseDraggedMask         API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskLeftMouseDragged", macosx(10.0, 10.12)) = NSEventMaskLeftMouseDragged;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:141:83: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSRightMouseDraggedMask        API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskRightMouseDragged", macosx(10.0, 10.12)) = NSEventMaskRightMouseDragged;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:142:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSMouseEnteredMask             API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskMouseEntered", macosx(10.0, 10.12)) = NSEventMaskMouseEntered;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:143:78: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSMouseExitedMask              API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskMouseExited", macosx(10.0, 10.12)) = NSEventMaskMouseExited;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:144:75: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSKeyDownMask                  API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskKeyDown", macosx(10.0, 10.12)) = NSEventMaskKeyDown;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:145:73: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSKeyUpMask                    API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskKeyUp", macosx(10.0, 10.12)) = NSEventMaskKeyUp;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:146:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSFlagsChangedMask             API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskFlagsChanged", macosx(10.0, 10.12)) = NSEventMaskFlagsChanged;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:147:80: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSAppKitDefinedMask            API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskAppKitDefined", macosx(10.0, 10.12)) = NSEventMaskAppKitDefined;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:148:80: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSSystemDefinedMask            API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskSystemDefined", macosx(10.0, 10.12)) = NSEventMaskSystemDefined;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:149:84: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSApplicationDefinedMask       API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskApplicationDefined", macosx(10.0, 10.12)) = NSEventMaskApplicationDefined;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:150:75: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSPeriodicMask                 API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskPeriodic", macosx(10.0, 10.12)) = NSEventMaskPeriodic;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:151:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSCursorUpdateMask             API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskCursorUpdate", macosx(10.0, 10.12)) = NSEventMaskCursorUpdate;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:152:78: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSScrollWheelMask              API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskScrollWheel", macosx(10.0, 10.12)) = NSEventMaskScrollWheel;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:153:78: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSTabletPointMask              API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskTabletPoint", macosx(10.0, 10.12)) = NSEventMaskTabletPoint;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:154:82: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSTabletProximityMask          API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskTabletProximity", macosx(10.0, 10.12)) = NSEventMaskTabletProximity;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:155:81: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSOtherMouseDownMask           API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskOtherMouseDown", macosx(10.0, 10.12)) = NSEventMaskOtherMouseDown;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:156:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSOtherMouseUpMask             API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskOtherMouseUp", macosx(10.0, 10.12)) = NSEventMaskOtherMouseUp;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:157:83: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSOtherMouseDraggedMask        API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskOtherMouseDragged", macosx(10.0, 10.12)) = NSEventMaskOtherMouseDragged;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:158:75: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventMask NSAnyEventMask                 API_DEPRECATED_WITH_REPLACEMENT("NSEventMaskAny", macosx(10.0, 10.12)) = NSUIntegerMax;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:181:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSAlphaShiftKeyMask         API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagCapsLock", macosx(10.0, 10.12)) = NSEventModifierFlagCapsLock;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:182:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSShiftKeyMask              API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagShift", macosx(10.0, 10.12)) = NSEventModifierFlagShift;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:183:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSControlKeyMask            API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagControl", macosx(10.0, 10.12)) = NSEventModifierFlagControl;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:184:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSAlternateKeyMask          API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagOption", macosx(10.0, 10.12)) = NSEventModifierFlagOption;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:185:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSCommandKeyMask            API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagCommand", macosx(10.0, 10.12)) = NSEventModifierFlagCommand;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:186:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSNumericPadKeyMask         API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagNumericPad", macosx(10.0, 10.12)) = NSEventModifierFlagNumericPad;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:187:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSHelpKeyMask               API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagHelp", macosx(10.0, 10.12)) = NSEventModifierFlagHelp;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:188:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSFunctionKeyMask           API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagFunction", macosx(10.0, 10.12)) = NSEventModifierFlagFunction;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:189:107: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventModifierFlags NSDeviceIndependentModifierFlagsMask    API_DEPRECATED_WITH_REPLACEMENT("NSEventModifierFlagDeviceIndependentFlagsMask", macosx(10.0, 10.12)) = NSEventModifierFlagDeviceIndependentFlagsMask;
                                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:199:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSPointingDeviceType NSUnknownPointingDevice     API_DEPRECATED_WITH_REPLACEMENT("NSPointingDeviceTypeUnknown", macosx(10.0, 10.12)) = NSPointingDeviceTypeUnknown;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:200:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSPointingDeviceType NSPenPointingDevice         API_DEPRECATED_WITH_REPLACEMENT("NSPointingDeviceTypePen", macosx(10.0, 10.12)) = NSPointingDeviceTypePen;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:201:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSPointingDeviceType NSCursorPointingDevice      API_DEPRECATED_WITH_REPLACEMENT("NSPointingDeviceTypeCursor", macosx(10.0, 10.12)) = NSPointingDeviceTypeCursor;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:202:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSPointingDeviceType NSEraserPointingDevice      API_DEPRECATED_WITH_REPLACEMENT("NSPointingDeviceTypeEraser", macosx(10.0, 10.12)) = NSPointingDeviceTypeEraser;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:211:92: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventButtonMask NSPenTipMask                API_DEPRECATED_WITH_REPLACEMENT("NSEventButtonMaskPenTip", macosx(10.0, 10.12)) = NSEventButtonMaskPenTip;
                                                                                           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:212:92: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventButtonMask NSPenLowerSideMask          API_DEPRECATED_WITH_REPLACEMENT("NSEventButtonMaskPenLowerSide", macosx(10.0, 10.12)) = NSEventButtonMaskPenLowerSide;
                                                                                           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:213:92: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventButtonMask NSPenUpperSideMask          API_DEPRECATED_WITH_REPLACEMENT("NSEventButtonMaskPenUpperSide", macosx(10.0, 10.12)) = NSEventButtonMaskPenUpperSide;
                                                                                           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:254:97: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSWindowExposedEventType            API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeWindowExposed", macosx(10.0, 10.12)) = NSEventSubtypeWindowExposed;
                                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:255:97: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSApplicationActivatedEventType     API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeApplicationActivated", macosx(10.0, 10.12)) = NSEventSubtypeApplicationActivated;
                                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:256:97: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSApplicationDeactivatedEventType   API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeApplicationDeactivated", macosx(10.0, 10.12)) = NSEventSubtypeApplicationDeactivated;
                                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:257:97: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSWindowMovedEventType              API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeWindowMoved", macosx(10.0, 10.12)) = NSEventSubtypeWindowMoved;
                                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:258:97: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSScreenChangedEventType            API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeScreenChanged", macosx(10.0, 10.12)) = NSEventSubtypeScreenChanged;
                                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:260:93: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSPowerOffEventType             API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypePowerOff", macosx(10.0, 10.12)) = NSEventSubtypePowerOff;
                                                                                            ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:261:93: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSMouseEventSubtype             API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeMouseEvent", macosx(10.0, 10.12)) = NSEventSubtypeMouseEvent;
                                                                                            ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:262:93: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSTabletPointEventSubtype       API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeTabletPoint", macosx(10.0, 10.12)) = NSEventSubtypeTabletPoint;
                                                                                            ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:263:93: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSTabletProximityEventSubtype   API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeTabletProximity", macosx(10.0, 10.12)) = NSEventSubtypeTabletProximity;
                                                                                            ^
/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:264:93: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSEventSubtype NSTouchEventSubtype             API_DEPRECATED_WITH_REPLACEMENT("NSEventSubtypeTouch", macosx(10.0, 10.12)) = NSEventSubtypeTouch;
                                                                                            ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:15:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSActionCell.h:8:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSCell.h:11:
/System/Library/Frameworks/AppKit.framework/Headers/NSText.h:164:82: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTextAlignment NSLeftTextAlignment API_DEPRECATED_WITH_REPLACEMENT("NSTextAlignmentLeft", macosx(10.0, 10.12))  = NSTextAlignmentLeft;
                                                                                 ^
/System/Library/Frameworks/AppKit.framework/Headers/NSText.h:165:83: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTextAlignment NSRightTextAlignment API_DEPRECATED_WITH_REPLACEMENT("NSTextAlignmentRight", macosx(10.0, 10.12))  = NSTextAlignmentRight;
                                                                                  ^
/System/Library/Frameworks/AppKit.framework/Headers/NSText.h:166:84: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTextAlignment NSCenterTextAlignment API_DEPRECATED_WITH_REPLACEMENT("NSTextAlignmentCenter", macosx(10.0, 10.12))  = NSTextAlignmentCenter;
                                                                                   ^
/System/Library/Frameworks/AppKit.framework/Headers/NSText.h:167:87: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTextAlignment NSJustifiedTextAlignment API_DEPRECATED_WITH_REPLACEMENT("NSTextAlignmentJustified", macosx(10.0, 10.12))  = NSTextAlignmentJustified;
                                                                                      ^
/System/Library/Frameworks/AppKit.framework/Headers/NSText.h:168:85: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTextAlignment NSNaturalTextAlignment API_DEPRECATED_WITH_REPLACEMENT("NSTextAlignmentNatural", macosx(10.0, 10.12))  = NSTextAlignmentNatural;
                                                                                    ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:15:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSActionCell.h:8:
/System/Library/Frameworks/AppKit.framework/Headers/NSCell.h:102:81: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSControlSize NSRegularControlSize API_DEPRECATED_WITH_REPLACEMENT("NSControlSizeRegular", macosx(10.0, 10.12)) = NSControlSizeRegular;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSCell.h:103:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSControlSize NSSmallControlSize API_DEPRECATED_WITH_REPLACEMENT("NSControlSizeSmall", macosx(10.0, 10.12)) = NSControlSizeSmall;
                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSCell.h:104:78: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSControlSize NSMiniControlSize API_DEPRECATED_WITH_REPLACEMENT("NSControlSizeMini", macosx(10.0, 10.12)) = NSControlSizeMini;
                                                                             ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:16:
/System/Library/Frameworks/AppKit.framework/Headers/NSAlert.h:180:79: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSAlertStyle NSWarningAlertStyle API_DEPRECATED_WITH_REPLACEMENT("NSAlertStyleWarning", macosx(10.3, 10.12)) = NSAlertStyleWarning;
                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSAlert.h:181:85: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSAlertStyle NSInformationalAlertStyle API_DEPRECATED_WITH_REPLACEMENT("NSAlertStyleInformational", macosx(10.3, 10.12)) = NSAlertStyleInformational;
                                                                                    ^
/System/Library/Frameworks/AppKit.framework/Headers/NSAlert.h:182:80: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSAlertStyle NSCriticalAlertStyle API_DEPRECATED_WITH_REPLACEMENT("NSAlertStyleCritical", macosx(10.3, 10.12)) = NSAlertStyleCritical;
                                                                               ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:22:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSButton.h:9:
/System/Library/Frameworks/AppKit.framework/Headers/NSButtonCell.h:242:83: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSBezelStyle NSThickSquareBezelStyle API_DEPRECATED_WITH_REPLACEMENT("NSBezelStyleRegularSquare", macosx(10.0, 10.12)) = (NSBezelStyle)3;
                                                                                  ^
/System/Library/Frameworks/AppKit.framework/Headers/NSButtonCell.h:243:85: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSBezelStyle NSThickerSquareBezelStyle API_DEPRECATED_WITH_REPLACEMENT("NSBezelStyleRegularSquare", macosx(10.0, 10.12)) = (NSBezelStyle)4;
                                                                                    ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:38:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSFontPanel.h:8:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSPanel.h:8:
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:676:12: error: unknown property attribute 'class'
@property (class) BOOL allowsAutomaticWindowTabbing NS_AVAILABLE_MAC(10_12);
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:680:12: error: unknown property attribute 'class'
@property (class, readonly) NSWindowUserTabbingPreference userTabbingPreference NS_AVAILABLE_MAC(10_12);
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:952:87: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSBorderlessWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskBorderless", macosx(10.0, 10.12)) = NSWindowStyleMaskBorderless;
                                                                                      ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:953:83: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSTitledWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskTitled", macosx(10.0, 10.12)) = NSWindowStyleMaskTitled;
                                                                                  ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:954:85: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSClosableWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskClosable", macosx(10.0, 10.12)) = NSWindowStyleMaskClosable;
                                                                                    ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:955:91: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSMiniaturizableWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskMiniaturizable", macosx(10.0, 10.12)) = NSWindowStyleMaskMiniaturizable;
                                                                                          ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:956:86: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSResizableWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskResizable", macosx(10.0, 10.12)) = NSWindowStyleMaskResizable;
                                                                                     ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:957:95: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSTexturedBackgroundWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskTexturedBackground", macosx(10.0, 10.12)) = NSWindowStyleMaskTexturedBackground;
                                                                                              ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:958:99: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSUnifiedTitleAndToolbarWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskUnifiedTitleAndToolbar", macosx(10.0, 10.12)) = NSWindowStyleMaskUnifiedTitleAndToolbar;
                                                                                                  ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:959:87: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSFullScreenWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskFullScreen", macosx(10.0, 10.12)) = NSWindowStyleMaskFullScreen;
                                                                                      ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:960:96: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSFullSizeContentViewWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskFullSizeContentView", macosx(10.0, 10.12)) = NSWindowStyleMaskFullSizeContentView;
                                                                                               ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:961:84: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSUtilityWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskUtilityWindow", macosx(10.0, 10.12)) = NSWindowStyleMaskUtilityWindow;
                                                                                   ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:962:85: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSDocModalWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskDocModalWindow", macosx(10.0, 10.12)) = NSWindowStyleMaskDocModalWindow;
                                                                                    ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:963:89: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSNonactivatingPanelMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskNonactivatingPanel", macosx(10.0, 10.12)) = NSWindowStyleMaskNonactivatingPanel;
                                                                                        ^
/System/Library/Frameworks/AppKit.framework/Headers/NSWindow.h:964:80: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSWindowStyleMask NSHUDWindowMask API_DEPRECATED_WITH_REPLACEMENT("NSWindowStyleMaskHUDWindow", macosx(10.0, 10.12)) = NSWindowStyleMaskHUDWindow;
                                                                               ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:44:
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:105:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *blackColor;        /* 0.0 white */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:106:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *darkGrayColor;     /* 0.333 white */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:107:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *lightGrayColor;    /* 0.667 white */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:108:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *whiteColor;        /* 1.0 white */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:109:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *grayColor;         /* 0.5 white */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:110:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *redColor;          /* 1.0, 0.0, 0.0 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:111:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *greenColor;        /* 0.0, 1.0, 0.0 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:112:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *blueColor;         /* 0.0, 0.0, 1.0 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:113:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *cyanColor;         /* 0.0, 1.0, 1.0 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:114:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *yellowColor;       /* 1.0, 1.0, 0.0 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:115:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *magentaColor;      /* 1.0, 0.0, 1.0 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:116:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *orangeColor;       /* 1.0, 0.5, 0.0 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:117:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *purpleColor;       /* 0.5, 0.0, 0.5 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:118:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *brownColor;        /* 0.6, 0.4, 0.2 RGB */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:119:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *clearColor;        /* 0.0 white, 0.0 alpha */
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:121:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *controlShadowColor;            // Dark border for controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:122:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *controlDarkShadowColor;        // Darker border for controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:123:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *controlColor;                  // Control face and old window background color
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:124:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *controlHighlightColor;         // Light border for controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:125:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *controlLightHighlightColor;    // Lighter border for controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:126:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *controlTextColor;              // Text on controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:127:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *controlBackgroundColor;        // Background of large controls (browser, tableview, clipview, ...)
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:128:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *selectedControlColor;          // Control face for selected controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:129:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *secondarySelectedControlColor; // Color for selected controls when control is not active (that is, not focused)
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:130:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *selectedControlTextColor;      // Text on selected controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:131:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *disabledControlTextColor;      // Text on disabled controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:132:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *textColor;                     // Document text
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:133:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *textBackgroundColor;           // Document text background
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:134:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *selectedTextColor;             // Selected document text
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:135:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *selectedTextBackgroundColor;   // Selected document text background
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:136:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *gridColor;                     // Grids in controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:137:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *keyboardFocusIndicatorColor;   // Keyboard focus ring around controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:138:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *windowBackgroundColor;         // Background fill for window contents
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:139:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *underPageBackgroundColor NS_AVAILABLE_MAC(10_8); // Background areas revealed behind views
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:141:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *labelColor NS_AVAILABLE_MAC(10_10);              // Text color for static text and related elements
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:142:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *secondaryLabelColor NS_AVAILABLE_MAC(10_10);     // Text color for secondary static text and related elements
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:143:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *tertiaryLabelColor NS_AVAILABLE_MAC(10_10);      // Text color for disabled static text and related elements
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:144:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *quaternaryLabelColor NS_AVAILABLE_MAC(10_10);    // Text color for large secondary or disabled static text, separators, large glyphs/icons, etc
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:146:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *scrollBarColor;                // Scroll bar slot color
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:147:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *knobColor;                     // Knob face color for controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:148:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *selectedKnobColor;             // Knob face color for selected controls
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:150:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *windowFrameColor;              // Window frames
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:151:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *windowFrameTextColor;          // Text on window frames
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:153:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *selectedMenuItemColor;         // Highlight color for menus
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:154:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *selectedMenuItemTextColor;     // Highlight color for menu text
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:156:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *highlightColor;                // Highlight color for UI elements (this is abstract and defines the color all highlights tend toward)
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:157:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *shadowColor;                   // Shadow color for UI elements (this is abstract and defines the color all shadows tend toward)
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:159:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *headerColor;                   // Background color for header cells in Table/OutlineView
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:160:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *headerTextColor;               // Text color for header cells in Table/OutlineView
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:162:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *alternateSelectedControlColor;      // Similar to selectedControlColor; for use in lists and tables
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:163:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *alternateSelectedControlTextColor;  // Similar to selectedControlTextColor; see alternateSelectedControlColor
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:165:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSArray<NSColor *> *controlAlternatingRowBackgroundColors;  // Standard colors for alternating colored rows in tables and lists (for instance, light blue/white; don't assume just two colors)
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:167:12: error: unknown property attribute 'class'
@property (class, readonly) NSControlTint currentControlTint;   // returns current system control tint
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:171:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColor *scrubberTexturedBackgroundColor NS_AVAILABLE_MAC(10_12_1); // Patterned background color for use in NSScrubber
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColor.h:301:12: error: unknown property attribute 'class'
@property (class) BOOL ignoresAlpha;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:45:
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:70:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *sRGBColorSpace NS_AVAILABLE_MAC(10_5);
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:71:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *genericGamma22GrayColorSpace NS_AVAILABLE_MAC(10_6);             // The grayscale color space with gamma 2.2, compatible with sRGB
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:73:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *extendedSRGBColorSpace NS_AVAILABLE_MAC(10_12);                  // sRGB compatible color space that allows specifying components beyond the range of [0.0, 1.0]
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:74:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *extendedGenericGamma22GrayColorSpace NS_AVAILABLE_MAC(10_12);    // sRGB compatible gray color space that allows specifying components beyond the range of [0.0, 1.0]
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:76:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *displayP3ColorSpace NS_AVAILABLE_MAC(10_12);     // Standard DCI-P3 primaries, a D65 white point, and the same gamma curve as the sRGB IEC61966-2.1 color space
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:78:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *adobeRGB1998ColorSpace NS_AVAILABLE_MAC(10_5);
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:80:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *genericRGBColorSpace;         // NSColorSpace corresponding to Cocoa color space name NSCalibratedRGBColorSpace
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:81:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *genericGrayColorSpace;        // NSColorSpace corresponding to Cocoa color space name NSCalibratedWhiteColorSpace
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:82:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *genericCMYKColorSpace;
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:83:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *deviceRGBColorSpace;          // NSColorSpace corresponding to Cocoa color space name NSDeviceRGBColorSpace
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:84:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *deviceGrayColorSpace;         // NSColorSpace corresponding to Cocoa color space name NSDeviceWhiteColorSpace
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSColorSpace.h:85:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSColorSpace *deviceCMYKColorSpace;         // NSColorSpace corresponding to Cocoa color space name NSDeviceCMYKColorSpace
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:90:
/System/Library/Frameworks/AppKit.framework/Headers/NSScrubber.h:73:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSScrubberSelectionStyle *outlineOverlayStyle;
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSScrubber.h:74:12: error: unknown property attribute 'class'
@property (class, strong, readonly) NSScrubberSelectionStyle *roundedBackgroundStyle;
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:94:
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderAccessory.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSSliderAccessoryBehavior *automaticBehavior  NS_SWIFT_NAME(automatic);
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderAccessory.h:48:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSSliderAccessoryBehavior *valueStepBehavior NS_SWIFT_NAME(valueStep);
           ^
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderAccessory.h:51:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSSliderAccessoryBehavior *valueResetBehavior NS_SWIFT_NAME(valueReset);
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:122:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSSlider.h:9:
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderCell.h:125:81: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTickMarkPosition NSTickMarkBelow API_DEPRECATED_WITH_REPLACEMENT("NSTickMarkPositionBelow", macosx(10.0, 10.12)) = NSTickMarkPositionBelow;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderCell.h:126:81: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTickMarkPosition NSTickMarkAbove API_DEPRECATED_WITH_REPLACEMENT("NSTickMarkPositionAbove", macosx(10.0, 10.12)) = NSTickMarkPositionAbove;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderCell.h:127:80: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTickMarkPosition NSTickMarkLeft API_DEPRECATED_WITH_REPLACEMENT("NSTickMarkPositionLeading", macosx(10.0, 10.12)) = NSTickMarkPositionLeading;
                                                                               ^
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderCell.h:128:81: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSTickMarkPosition NSTickMarkRight API_DEPRECATED_WITH_REPLACEMENT("NSTickMarkPositionTrailing", macosx(10.0, 10.12)) = NSTickMarkPositionTrailing;
                                                                                ^
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderCell.h:130:74: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSSliderType NSLinearSlider API_DEPRECATED_WITH_REPLACEMENT("NSSliderTypeLinear", macosx(10.0, 10.12)) = NSSliderTypeLinear;
                                                                         ^
/System/Library/Frameworks/AppKit.framework/Headers/NSSliderCell.h:131:76: error: expected a version of the form 'major[.minor[.subminor]]'
static const NSSliderType NSCircularSlider API_DEPRECATED_WITH_REPLACEMENT("NSSliderTypeCircular", macosx(10.0, 10.12)) = NSSliderTypeCircular;
                                                                           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:126:
/System/Library/Frameworks/AppKit.framework/Headers/NSGridView.h:210:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSView *emptyContentView; // This view is used as a marker in NSGridView's "...WithViews:" methods to indicate a cell whose contentView should be nil.
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:145:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSTableCellView.h:15:
In file included from /System/Library/Frameworks/AppKit.framework/Headers/NSTableView.h:14:
/System/Library/Frameworks/AppKit.framework/Headers/NSTextView.h:197:22: error: unknown property attribute 'class'
@property (readonly, class) BOOL stronglyReferencesTextStorage NS_AVAILABLE_MAC(10_12);
                     ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:14:
In file included from /System/Library/Frameworks/CoreData.framework/Headers/CoreData.h:19:
In file included from /System/Library/Frameworks/CoreData.framework/Headers/NSFetchRequest.h:10:
/System/Library/Frameworks/CoreData.framework/Headers/NSManagedObject.h:50:11: error: unknown property attribute 'class'
@property(class, readonly) BOOL contextShouldIgnoreUnmodeledPropertyChanges API_AVAILABLE(macosx(10.6),ios(3.0));
          ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:14:
In file included from /System/Library/Frameworks/CoreData.framework/Headers/CoreData.h:26:
/System/Library/Frameworks/CoreData.framework/Headers/NSPersistentStoreCoordinator.h:218:11: error: unknown property attribute 'class'
@property(class, readonly, strong) NSDictionary<NSString *, NSValue *> *registeredStoreTypes API_AVAILABLE(macosx(10.5),ios(3.0));
          ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:14:
In file included from /System/Library/Frameworks/CoreData.framework/Headers/CoreData.h:47:
/System/Library/Frameworks/CoreData.framework/Headers/NSMergePolicy.h:132:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSMergePolicy *errorMergePolicy API_AVAILABLE(macosx(10.12),ios(10.0),tvos(10.0),watchos(3.0));
           ^
/System/Library/Frameworks/CoreData.framework/Headers/NSMergePolicy.h:133:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSMergePolicy *rollbackMergePolicy API_AVAILABLE(macosx(10.12),ios(10.0),tvos(10.0),watchos(3.0));
           ^
/System/Library/Frameworks/CoreData.framework/Headers/NSMergePolicy.h:134:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSMergePolicy *overwriteMergePolicy API_AVAILABLE(macosx(10.12),ios(10.0),tvos(10.0),watchos(3.0));
           ^
/System/Library/Frameworks/CoreData.framework/Headers/NSMergePolicy.h:135:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSMergePolicy *mergeByPropertyObjectTrumpMergePolicy API_AVAILABLE(macosx(10.12),ios(10.0),tvos(10.0),watchos(3.0));
           ^
/System/Library/Frameworks/CoreData.framework/Headers/NSMergePolicy.h:136:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSMergePolicy *mergeByPropertyStoreTrumpMergePolicy API_AVAILABLE(macosx(10.12),ios(10.0),tvos(10.0),watchos(3.0));
           ^
In file included from Library/Go/src/golang.org/x/mobile/app/darwin_amd64.go:17:
In file included from /System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:14:
In file included from /System/Library/Frameworks/CoreData.framework/Headers/CoreData.h:50:
/System/Library/Frameworks/CoreData.framework/Headers/NSQueryGenerationToken.h:16:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSQueryGenerationToken *currentQueryGenerationToken; // Used to inform a context that it should use the current generation
           ^
464 errors generated.

[akabos]

I resolved that by installing full Xcode. Docs suggest only Command Line Tools tools are required. Apparently this is not the case.