Do you have a reference of a case where this was violated? I had thought that Apple at least actually had real hardware paths to monitor webcam activity, unless the hardware was physically compromised.
https://www.usenix.org/system/files/conference/usenixsecurit...
https://daringfireball.net/2019/02/on_covering_webcams
> Here’s an answer I received from a former engineer at Apple who was intimately familiar with the software drivers for Mac webcams: "All cameras after that one were different: The hardware team tied the LED to a hardware signal from the sensor: If the (I believe) vertical sync was active, the LED would light up. There is NO firmware control to disable/enable the LED. The actual firmware is indeed flashable, but the part is not a generic part and there are mechanisms in place to verify the image being flashed. […]"