The registry identifier for the GPU used for video decoding.
- macOS 10.13+
By default, whenever possible, the GPU associated with the display presenting the
CALayer performs the video decoding. Decode transitions to a new GPU, if appropriate, when the CALayer moves to a new display. This property overrides this default behavior, forcing decode to prefer an affinity to the GPU specified regardless of which GPU displays the associated
CALayer. Obrain the GPU registry ID from the GPU
registry or from OpenGL or OpenCL.