So I wanted to use Photo Booth and suddenly “There Is No Connected Camera” screen appeared. Searching for solution on Google, I found out some ones like a special commands in Terminal to fix this problem. I opened Terminal, began to type commands such as “sudo killall VDCAssistant” and “sudo killall AppleCameraAssistant” bun none of them had worked and Terminal responded with “No matching processes were found”. Restart didn’t solve the problem, as well as SMC and NVRAM reset!