Indicates that the prepared to play status of the media player has changed.
Mac Catalyst 13.0–13.0Deprecated
Posted upon change in the prepared-to-play state of an object conforming to the MPMediaPlayback protocol. The object whose state has changed is available as the object associated with the notification.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.