I am using the WebEx screen-sharing/online meeting software on a MacBook Pro. When active, it grabs control of the built-in video camera, even though all I want to do is screen-sharing. This even happens when I am just watching other people's screens (and not sharing anything myself).
Since the application itself seems to have no setting regarding the video camera, is there a way to selectively disable access to the camera from the OS?
Or alternatively, a master switch to disable the camera altogether?