Updates the value of the master input plug (simulating a lock transaction).
UIKit for Mac 13.0+Beta
Pointer to IOFireWireAVCLibProtocolInterface.
Value returned by readInputMasterPlug.
New value to store in plug if its current value is oldVal.
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.