Next I've shared specification and some debug information if it helps. VDCAssistant and UVCAssistant do not support it according to attached logs. It's connected to my laptop via USB-C hub. Just a black screen, and not even Logitech's own software can see the camera, other than to tell me it is being used by another application, which it is not. If your camera is connected to a USB 3.0 port (usually has a blue plastic insert), try using a USB 2.0 port instead.
Make sure you're using the correct driver for your camera by selecting the Downloads tab on your product's support page. Make sure the camera isn't connected to a USB hub or docking station.
Hi, my Logitech HD Pro Webcam C910 stopped working after update to Monetery, it used to work great on macOS up until today. So I run the latest update to Mac OS 10 El Capitan to move to version 10.11.6 and now I get nothing on my Logitech HD Pro Webcam C920. If your camera isn't detected by your computer, please try the following: Try a different USB port on your computer.