I want to save others the trouble: Webcam Utility will ONLY work for Mac M1 (AKA the 2020 models that don't have the Intel Chips) running Big Sur 11.0. Stop searching for a fix because there isn't one.
Canon: is adding support for this on your Webcam Utility roadmap? Can you PLEASE post a fix to your software? My only option is to revert back to Big Sur 11.0, and I can't do that because I don't have a backup.
For what it's worth, I checked reddit to see if others had this problem. The suggestion I received was to download the version of zoom designed for intel macs. When I did this the new zoom program instantly recognized EOS Webcam Utility. I don't know what program you were trying to use your camera for, but this fixed my issue. Good luck!
I say keep checking back. Canon, and other manufacturers; stay up-to-date with MS Windows, but not with Apple for some reason. Despite previous rants, the issue of trying to keep up with Apple is not unique to Canaon.
Look around. Every other camera manufacturer is in the same boat. An Apple update not only broke their software, but now you need to develop for an entirely new hardware platform. Now your development team needs to go to Apple school to get trained and certified on the new platform.
All that I have been saying is don't be so quick to blame Canon. Many companies are having similar issues with Apple. If everyone is having the same problem with the same company, where do you think the problem lies?
Adobe Creative Suite or MS Office worked flawless since day one on the M1 with Rosetta 2, like nearly everything and were mostly updated to M1 since. The only one with huge problems are the hardware companies - cameras, printers, sound interfaces etc (while i must state, that my 10Year old Focusrite interfaces still works on the M1 without any issues).
BTW: You can download XCode with everything included FOR FREE! You can develop for free! The Kernel is mostly even open Source. The only fee you have to pay is if u want your software to be distributed via the Mac App Store or want it to be signed - both are not necessary but handy. But since Canon has Apps in the iOS App Store, they probably DO have a development account anyway.
You only need to be a paid developer, if u want the early excess to development tools for not yet publicly released OS Updates. But Big Sur is now out for long enough to have an update ready even without that. I mean at last - every other canon software i have in use, or just happened to test, is working normally either as an universal app or via Rosetta 2. Only the Webcam Utility does not. It was never updated in any form since it released. And it never really worked perfect - no matter what platform.
This is all nonsense about developing for Apple. Apple is easy to develop for and on the Mac you don't need to use the app store (that is only required for iOS). If Canon needs to get their software signed by Apple, that takes a week, maximum (these days often much quicker).
Besides! Nikon updated their utility for m1 in mid December, so all points are moot. Don't make me set up my z6 again, Canon! I want to sell it so I can buy more items from you. All the utilities need some polish for the new apple hardware and full r5 support. M1s have been out a long time now and new Pro versions are on the horizon. The R5 has been out a while now. Canon nees to up their software dev team yesterday.
WWDC for the past several years now has even been free to those not phyisically attending (I watch the yearly set of videos as they are made available for anything that would be relevant to my software). During the most recent WWDCs, Apple software engineers have been on-hand for help sessions to get past any sticking points. Along with developer technical support (two free incidents per year included with the developer program), there's a very decent amount of support.
Now then, as with any software company, Apple's software may indeed have bugs. Especially in the early development builds. But, that's a great time to catch bugs in your own software too; far before the OS makes its way to the public.
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