I gave up on this a long time ago. I have a MacBook Air with the latest BS OS and I only use Nikon ViewNX-i. If my print doesn't look the way I want it to then I throw it away and make the adjustments necessary (usually exposure and/or brightness at ...
I just got a Pro-100 and when I go to this page https://en.canon-cna.com/support/consumer_products/products/printers/inkjet/pixma_pro_series/pixma_pro-100.html?type=download&language=&os=macos%2011.0%20(big%20sur) (selecting Big Sur)... Print Studio ...