How to Fix FaceTime camera issue in El Capitan

I had this problem when I upgraded from Yosemite to El Capitan, the built-in FaceTime HD camera did not activate in the FaceTime and other applications.

To fix this issue, run the following:

sudo killall AppleCameraAssistant
AND/OR
sudo killall VDCAssistant

If your camera is still not detected, you might need to restart the system.

That’s it!