Hello there,
I was facing the same issue. It has to do with the privacy settings of the built-in cam of the mac.
The Unity version you're using is in the Applications folder on your mac. So delete Unity Hub and start Unity from the Applications folder. In that way Unity asks you to grant access for the camera, which should accepted.
Once the access for the camera is granted, you can install Unity Hub again and start your project without having a crash.