I installed OBS Studio on my iMac. It created a Virtual Camera which Mathematica recognizes as the primary camera. OBS Studio was installed for trying this application out but I don't have a need for it.
There is no uninstall process, but according to online discussions, I just needed to delete the application in the /Applications directory, and its folder in the /Library/Application Support directory. I've done both, deleted the contents of Trash and rebooted.
Running
$ImagingDevices
I get the output
{"OBS Virtual Camera", "FaceTime HD Camera (Built-in)"}
just as I had before deleting the OBS app and directory.
When I execute
CurrentImage[]
The output is the OBS icon for the unconnected virtual camera.
Does anyone have a solution to this problem?