Tahoe 26: Thunderbolt Display camera won't work anymore
After updating to Tahoe, Thunderbolt Display camera is not working anymore. My Mac can't find that camera. What can I do?
MacBook Pro (2021)
start by checking Option-Apple menu, top item, system information.
Look on the USB section and thunderbolt,section for any trace of the camera.
if not found, give your display a timeout:
disconnect it from all power and all data and leave it alone for a quarter hour or more.
Pointing into the corner, or sitting on the naughty stair are optional.
Once found, you may need to re-check security & privacy settings to be creating it is allowed to be accessed by the apps you use. Typically, Photo Booth does not need any special access, so it is used as the test case.