AmacaC Said:
“No Camera Available Error on macOS Catalina: Hello, Please I just realized that my macbook camera isn't working for my applications (Photobooth and Facetime) after I updated to macOS Catalina.“
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Reinstall the macOS:
This seems to be a bug in the macOS or a glitch in either or both apps. Being that Photobooth and Facetime is built into the macOS, reinstalling the macOS would be the only way to fix this.
So, Try the Following in the Order Provided:
- Create a New Administrator User:
Create a new Administrator user and see what happens. If it does not occur, then it is something configured in your current user. Create this as the Administrator in:System Preferences > Users & Groups
Try logging in using Safe Mode (Hold down shift key upon boot). See if you can log in. Items only load as they do by default, while you are booted into Safe Mode, because a caches are set aside. Go Here: Use safe mode to isolate issues with your Mac - Apple Support
If of no success....
Move Ahead with Reinstalling the macOS:
Back Up your Mac:
Start by Creating a Time Machine Backupof my Mac. That way I could be assured that Incan recover my Mac, should I need the App back or if anything goes wrong due to the removal. So, Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall.
Reinstall the macOS:
Nothing would be deleted. It's just that items that have become corrupted or deleted, item would be placed back to where they should be. Go Here: How to reinstall macOS from macOS Recovery - Apple Support