How to fix “There is no connected camera” error that prevents you from using Camera with FaceTime under MacOS Mojave?
- Open Terminal, which can be found under /Applications/Utilities/
- Enter the following command, then hit return:
sudo killall VDCAssistant
- Then enter one more command line.
sudo killall AppleCameraAssistant
During the processes, the administrator password might be requested (this is the password is used to unlock your Mac from the locked screen)