can't open app for macOS catalina 10.15.3

[MarsonShine]

when i successfully installed, but can't open anyway

[jeffreye]

Could you share more information?

You might want to run it using Terminal so that you could see the error message.

[MarsonShine]

I'm sorry I didn't see the reply until now
i'm trying open it in terminal，and return this detail error message follow
zhuqindeMacBook-Pro:Downloads summer$ open ILSpy.app LSOpenURLsWithRole() failed with error -10810 for the file /Users/summer/Downloads/ILSpy.app.
there are some pictures when error occurred

tips:first image means is "ilspy app can't open"

[MarsonShine]

github is broken？
always telling me "i can't comment at this time"

[peledkfir]

I'm experiencing crashes as well on OSX 10.15.3, dotnet core: 3.1.102
Attaching stacktrace

ILSpy[89863:505989] WARNING: NSWindow drag regions should only be invalidated on the Main Thread! This will throw an exception in the future. Called from (
0 AppKit 0x00007fff2c9e6265 -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 371
1 AppKit 0x00007fff2c9cdbc5 -[NSWindow _initContent:styleMask:backing:defer:contentView:] + 1416
2 AppKit 0x00007fff2c9cd637 -[NSWindow initWithContentRect:styleMask:backing:defer:] + 42
3 AppKit 0x00007fff2d24a49c -[NSWindow init] + 75
4 libAvaloniaNative.dylib 0x00000001077d6d58 -[AvnWindow initWithParent:] + 54
5 libAvaloniaNative.dylib 0x00000001077d7ded _ZN14WindowBaseImplC2EP20IAvnWindowBaseEvents + 257
6 libAvaloniaNative.dylib 0x00000001077d7be4 _ZN10WindowImplC1EP16IAvnWindowEvents + 90
7 libAvaloniaNative.dylib 0x00000001077d7b56 _Z15CreateAvnWindowP16IAvnWindowEvents + 46
8 libAvaloniaNative.dylib 0x00000001077d2df0 _ZTv0_n64_N14AvaloniaNative12CreateWindowEP16IAvnWindowEventsPP10IAvnWindow + 32
9 ??? 0x000000010d9c4912 0x0 + 4523313426
10 ??? 0x000000010d9c3f2b 0x0 + 4523310891
11 ??? 0x000000010d9c3e70 0x0 + 4523310704
12 ??? 0x000000010d9c3dcd 0x0 + 4523310541
13 ??? 0x000000010d9c38e9 0x0 + 4523309289
14 ??? 0x000000010d9c37f9 0x0 + 4523309049
15 ??? 0x000000010eb7b8e0 0x0 + 4541888736
16 ??? 0x000000010eb7b777 0x0 + 4541888375
17 ??? 0x000000010eb79cb3 0x0 + 4541881523
18 ??? 0x000000010eb78fc3 0x0 + 4541878211
19 ??? 0x000000010eb78f1b 0x0 + 4541878043
20 ??? 0x000000010eb78e86 0x0 + 4541877894
21 ??? 0x000000010eb78db7 0x0 + 4541877687
22 ??? 0x000000010eb78d09 0x0 + 4541877513
23 ??? 0x000000010b100732 0x0 + 4480567090
24 libcoreclr.dylib 0x0000000104b3fc1a FastCallFinalizeWorker + 6
25 libcoreclr.dylib 0x000000010490bd16 _ZN11MethodTable13CallFinalizerEP6Object + 598
26 libcoreclr.dylib 0x00000001049de54a _ZN15FinalizerThread18FinalizeAllObjectsEi + 186
27 libcoreclr.dylib 0x00000001049de7b1 _ZN15FinalizerThread21FinalizerThreadWorkerEPv + 209
28 libcoreclr.dylib 0x000000010494c8b3 _ZL31ManagedThreadBase_DispatchOuterP22ManagedThreadCallState + 323
29 libcoreclr.dylib 0x000000010494cf00 _ZN17ManagedThreadBase13FinalizerBaseEPFvPvE + 32
30 libcoreclr.dylib 0x00000001049dea18 _ZN15FinalizerThread20FinalizerThreadStartEPv + 504
31 libcoreclr.dylib 0x00000001047c4b24 _ZN7CorUnix10CPalThread11ThreadEntryEPv + 436
32 libsystem_pthread.dylib 0x00007fff66f02e65 _pthread_start + 148
33 libsystem_pthread.dylib 0x00007fff66efe83b thread_start + 15
)
Unhandled exception. System.InvalidOperationException: Call from invalid thread
at Avalonia.Threading.Dispatcher.VerifyAccess()
at ICSharpCode.ILSpy.AssemblyList.OpenAssembly(String file, Boolean isAutoLoaded)
at ICSharpCode.ILSpy.MainWindow.LoadAssemblies(IEnumerable1 fileNames, List1 loadedAssemblies, Boolean focusNode)
at System.Threading.Tasks.Task.<>c.b__139_1(Object state)
at System.Threading.QueueUserWorkItemCallbackDefaultContext.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
[1] 89863 abort ./ILSpy.app/Contents/MacOS/ILSpy

[jeffreye]

/Users/summer/Downloads/ILSpy.app.

try ./Users/summer/Downloads/ILSpy.app/Contents/MacOS/ILSpy

[jeffreye]

I'm experiencing crashes as well on OSX 10.15.3, dotnet core: 3.1.102
Attaching stacktrace

ILSpy[89863:505989] WARNING: NSWindow drag regions should only be invalidated on the Main Thread! This will throw an exception in the future. Called from (
0 AppKit 0x00007fff2c9e6265 -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 371
1 AppKit 0x00007fff2c9cdbc5 -[NSWindow _initContent:styleMask:backing:defer:contentView:] + 1416
2 AppKit 0x00007fff2c9cd637 -[NSWindow initWithContentRect:styleMask:backing:defer:] + 42
3 AppKit 0x00007fff2d24a49c -[NSWindow init] + 75
4 libAvaloniaNative.dylib 0x00000001077d6d58 -[AvnWindow initWithParent:] + 54
5 libAvaloniaNative.dylib 0x00000001077d7ded _ZN14WindowBaseImplC2EP20IAvnWindowBaseEvents + 257
6 libAvaloniaNative.dylib 0x00000001077d7be4 _ZN10WindowImplC1EP16IAvnWindowEvents + 90
7 libAvaloniaNative.dylib 0x00000001077d7b56 _Z15CreateAvnWindowP16IAvnWindowEvents + 46
8 libAvaloniaNative.dylib 0x00000001077d2df0 _ZTv0_n64_N14AvaloniaNative12CreateWindowEP16IAvnWindowEventsPP10IAvnWindow + 32
9 ??? 0x000000010d9c4912 0x0 + 4523313426
10 ??? 0x000000010d9c3f2b 0x0 + 4523310891
11 ??? 0x000000010d9c3e70 0x0 + 4523310704
12 ??? 0x000000010d9c3dcd 0x0 + 4523310541
13 ??? 0x000000010d9c38e9 0x0 + 4523309289
14 ??? 0x000000010d9c37f9 0x0 + 4523309049
15 ??? 0x000000010eb7b8e0 0x0 + 4541888736
16 ??? 0x000000010eb7b777 0x0 + 4541888375
17 ??? 0x000000010eb79cb3 0x0 + 4541881523
18 ??? 0x000000010eb78fc3 0x0 + 4541878211
19 ??? 0x000000010eb78f1b 0x0 + 4541878043
20 ??? 0x000000010eb78e86 0x0 + 4541877894
21 ??? 0x000000010eb78db7 0x0 + 4541877687
22 ??? 0x000000010eb78d09 0x0 + 4541877513
23 ??? 0x000000010b100732 0x0 + 4480567090
24 libcoreclr.dylib 0x0000000104b3fc1a FastCallFinalizeWorker + 6
25 libcoreclr.dylib 0x000000010490bd16 _ZN11MethodTable13CallFinalizerEP6Object + 598
26 libcoreclr.dylib 0x00000001049de54a _ZN15FinalizerThread18FinalizeAllObjectsEi + 186
27 libcoreclr.dylib 0x00000001049de7b1 _ZN15FinalizerThread21FinalizerThreadWorkerEPv + 209
28 libcoreclr.dylib 0x000000010494c8b3 _ZL31ManagedThreadBase_DispatchOuterP22ManagedThreadCallState + 323
29 libcoreclr.dylib 0x000000010494cf00 _ZN17ManagedThreadBase13FinalizerBaseEPFvPvE + 32
30 libcoreclr.dylib 0x00000001049dea18 _ZN15FinalizerThread20FinalizerThreadStartEPv + 504
31 libcoreclr.dylib 0x00000001047c4b24 _ZN7CorUnix10CPalThread11ThreadEntryEPv + 436
32 libsystem_pthread.dylib 0x00007fff66f02e65 _pthread_start + 148
33 libsystem_pthread.dylib 0x00007fff66efe83b thread_start + 15
)
Unhandled exception. System.InvalidOperationException: Call from invalid thread
at Avalonia.Threading.Dispatcher.VerifyAccess()
at ICSharpCode.ILSpy.AssemblyList.OpenAssembly(String file, Boolean isAutoLoaded)
at ICSharpCode.ILSpy.MainWindow.LoadAssemblies(IEnumerable1 fileNames, List1 loadedAssemblies, Boolean focusNode)
at System.Threading.Tasks.Task.<>c.b__139_1(Object state)
at System.Threading.QueueUserWorkItemCallbackDefaultContext.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
[1] 89863 abort ./ILSpy.app/Contents/MacOS/ILSpy

It looks like a different issue happens to you. You can open the application but crash when you try to open an assembly. Could you tell us how do you reproduce it?

[jfversluis]

I had the -10810 error as well. I think you need two things, first one potentionally being optional.

1. Downloaded files get a quarantine flag, remove that with xattr -l ILSpy.app/
2. Make the executable runnable with command chmod +x ./ILSpy.app/Contents/MacOS/ILSpy

That worked for me :)

[MarsonShine]

/Users/summer/Downloads/ILSpy.app.

try ./Users/summer/Downloads/ILSpy.app/Contents/MacOS/ILSpy

genius！！
it worked for me
thank you very mach

[MarsonShine]

i close comment
if anyone else has a familar problem，reopen it

[vahpetr]

Please, move solution to documentation

[gonz01d]

On Catalina 10.15.7 I needed to run the chmod and also the xattr command but with the -cr flags (likely in addition to having run with -l beforehand) :

xattr -cr /Users/gaz/Downloads/ILSpy.app