MacOS camera not available

I need Photo Booth and other apps to use ManyCam.

I followed instructions on website but I missed the first time and it no longer prompts me for camera anymore.

I think there is a serious bug here but I am not sure how to fix it. Most likely something is blocking the ManyCam macOS camera to not prompt me anymore to install it.

It is now a totally useless app because ManyCam is not a virtual camera in my macOS and there is no way to use it in other apps like Zoom or Discord.

Anyone has any idea how to fix this? Because the support is unresponsive and keep thinking there are no flaws in their buggy app and my scenario will never happen :person_facepalming:

I uninstalled and reinstalled many times to no avail. I thought it might appear under macOS settings extension but it didn’t. Not sure what else I can try. Advice would be appreciated.