Disable automatic window tabbing on 10.12+ until we fully implement it.

Source/SPConstants.h

@@ -665,18 +665,25 @@ typedef NS_ENUM(NSInteger,SPErrorCode) { // error codes in SPErrorDomain
 void _SPClear(id *addr);
 #define SPClear(x) _SPClear(&x)
 
-//Backwards compatibility
+// Backwards compatibility
 #ifndef __MAC_10_7
-#define __MAC_10_7 1070
+	#define __MAC_10_7 1070
 #endif
+
 #ifndef __MAC_10_8
-#define __MAC_10_8 1080
+	#define __MAC_10_8 1080
 #endif
+
 #ifndef __MAC_10_10
-#define __MAC_10_10 101000
+	#define __MAC_10_10 101000
 #endif
+
 #ifndef __MAC_10_11
-#define __MAC_10_11 101100
+	#define __MAC_10_11 101100
+#endif
+
+#ifndef __MAC_10_12
+	#define __MAC_10_12 101200
 #endif
 
 // This enum is available since 10.5 but only got a "name" in 10.10

Source/SPWindow.m

@@ -32,13 +32,27 @@
 #import "SPWindowController.h"
 
 @interface NSWindow (LionPlusMethods)
+
 - (void)toggleFullScreen:(id)sender;
+
 @end
 
 @implementation SPWindow
 
 @synthesize isSheetWhichCanBecomeMain;
 
+#pragma mark -
+
++ (void)initialize
+{
+#if __MAC_OS_X_VERSION_MAX_ALLOWED >= __MAC_10_12
+	// Disable automatic window tabbing on 10.12+
+	if ([NSWindow respondsToSelector:@selector(setAllowsAutomaticWindowTabbing:)]) {
+		[NSWindow setAllowsAutomaticWindowTabbing:NO];
+	}
+#endif
+}
+
 #pragma mark -
 #pragma mark Keyboard shortcut additions
 
@@ -140,7 +154,9 @@ - (NSUndoManager *)undoManager
 {
 	if ([[self windowController] respondsToSelector:@selector(selectedTableDocument)]) {
 		return [[[self windowController] selectedTableDocument] undoManager];
+
 	}
+
 	return [super undoManager];
 }
 
@@ -153,7 +169,6 @@ - (NSUndoManager *)undoManager
  */
 - (BOOL)canBecomeMainWindow
 {
-
 	// If this window is a sheet which is permitted to become main, respond appropriately
 	if ([self isSheet] && isSheetWhichCanBecomeMain) {
 		return [self isVisible];
@@ -190,7 +205,6 @@ - (void)toggleFullScreen:(id)sender
 
 - (BOOL)validateMenuItem:(NSMenuItem *)menuItem
 {
-
 	// If the item is the Show/Hide Toolbar menu item, override the text to allow correct translation
 	if ([menuItem action] == @selector(toggleToolbarShown:)) {
 		BOOL theResponse = [super validateMenuItem:menuItem];