 Starting with Mac OS X Lion, it is now the default media framework for the macOS platform.As a component of AVFoundation, AVKit is an API that comes with OS X Mavericks 10.9+ and can be used with Xcode 5.0+ for developing media player software for Mac.The AVKit software framework is replacing QTKit which was deprecated in OS X Mavericks, and was discontinued with the release of macOS Catalina.