...The cocoa, webkit, and core packages wrap objc with wrapper types for parts of the Apple/Mac APIs. They're being added to as needed by hand until we can automate this process with schema data. These packages effectively let you use Apple APIs as if they were native Go libraries, letting you write Mac applications (potentially also iOS, watchOS, etc) as Go applications. 1:1 mapping of API names with Objective-C APIs. Cocoa types: NSApplication, NSImage, NSMenu, NSWindow, more. Webkit types: WKWebView and configuration classes. ...