There is no special version for Big Sur so far. I installed the available version. It installs a driver, which appears as selectable camera in apps like Teams, Zoom or Streamlabs. No need to start an app, just connect your camera via USB and select i...
I got it set up and running with my MacBook Pro 2017 on Big Sur. I used the dmg-installer, made sure that the EOS utility doesn't autostart on USB-connect and have my M50 set to video.