#### Steps to reproduce: ```bash cd build.macos64x64/squeak.cog.spur make debug ```
#### Errors ``` /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:109:12: error: attributes may not be specified on a category @interface NSArray<ObjectType> (NSArrayDiffing) ^ /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:196:12: error: attributes may not be specified on a category @interface NSMutableArray<ObjectType> (NSMutableArrayDiffing) ^ In file included from <built-in>:1: In file included from ./../../platforms/iOS/vm/SqueakPureObjc_Prefix.pch:12: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:48: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSKeyValueCoding.h:8: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSOrderedSet.h:112:12: error: attributes may not be specified on a category @interface NSOrderedSet<ObjectType> (NSOrderedSetDiffing) ^ /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSOrderedSet.h:187:12: error: attributes may not be specified on a category @interface NSMutableOrderedSet<ObjectType> (NSMutableOrderedSetDiffing) ```