AppKit macOS 10.13 Beta 1 to Beta 2 API Differences

NSCustomImageRep.h
Modified NSCustomImageRep.delegate
Declaration
From@property (readonly, assign, nullable) id delegate
To@property (readonly, weak, nullable) id delegate

NSImage.h
Modified NSImage.delegate
Declaration
From@property (assign, nullable) id<NSImageDelegate> delegate
To@property (weak, nullable) id<NSImageDelegate> delegate

NSWindowController.h
Modified NSWindowController
Protocols
FromNSCoding, NSSeguePerforming
ToNSSeguePerforming