Big Sur: no printer driver needed. High Sierra: driver won't work because Big Sur can't scan it.
My Canon Pro9000II worked on my iMac with High Sierra. Upgraded to a Mac mini with Big Sur. I tried to Add Printer but I can't Choose a Driver because one doesn't exist and/or I don't know how to find it. Regardless, I went to Canon and tried to download one for Big Sur, but it isn't needed. So, I downloaded the one for High Sierra - when it did work - and tried to install it. Got an Error Message saying it can't be installed because it can't be scanned for viruses by Big Sur. So, I'm in a loop. Any ideas on how to get my printer working again? Grateful for your thoughts.
Terry
Mac mini, macOS 11.6