This is seriously a terrible solution. How do I downvote? The recommended app is $129.99. Do you advertise for them? Are you the app creator trying to make money? This post from @jrhoffman75 really should not be labeled "accepted solution". Bad stuff...
EOS webcam utility was released in Asia for Mac silicon. https://asia.canon/en/support/0200629304. I downloaded this update for my M1 Max and now EOS integration works fine. Nevermind the won't-solve post.
This worked for me / is the right answer. Just pay attention to top comment on the youtube video. You have to download the OBS version for Intel not M1. EOS Webcam Utility (intel) + OSB (intel) led to success on M1 Max for me. Hope this helps other f...