jimward wrote:
I upgraded to Sierra some weeks back and it wouldn't run Canon EOS Utilities, so I couldn't download images from camera to Mac. Apparently Canon hasn't upgraded, or hadn't at that stage. Bought a card reader, and it's a much better solution than downloading direct from camera to Mac, so a happy ending, but it still highlights an issue with upgrading.
That why there is Beta testing- to determine what works and what doesn't. Some Apple can fix, some has to be fixed by the originators of the code- like Canon or Epson, etc. Apple is quite open in publishing lists of what won't work with new versions of software. No one forces you to be the first to upgrade. Sit back and see what problems are found and fixed with the new release. When its looks stable and will run your software update.