A Boolean value that indicates whether AVCaptureMultiCamSession supports this format.
Mac Catalyst 13.0+
When performing single-camera capture using AVCaptureSession, you may set any of the device’s formats as its activeFormat. However, when using AVCaptureMultiCamSession, you may only set the device’s format to one in which multiCamSupported is YES. Only this limited subset of capture formats can run sustainably in a multi-camera capture scenario.