iMac camera freezes
When using the camera on my iMac for Zoom, Quicktime, Photobooth, ... the picture will freeze after anywhere between a few seconds and a few minutes. The computer works otherwise fine when it happens and the Zoom app works fine as well (all other participants are still moving).
I have tried SMC reset and PRAM reset - that seemed to solve the problem for the same day, but by the next day the camera started freezing again. I purchased an external camera (logitech) thinking something is wrong with the iMac camera, but the same happens with it as well.
I have an iMac 21.5" late-2015 16 GB RAM, MacOS Big Sur 11.0.1. The Zoom app is up to date.
Does anyone have an idea for a fix?
Thanks in advance.
iMac, OS X 10.10