Hi, I'm Robert and I'll be helping you with your printer question.
Unfortunately that printer seems to be conspicuously missing from the printer supported under osx 10.8
You can try the osx 10.7 driver from this page.
As this new iMac version has only been out for a few weeks, I prefer not to go back to the 10.7 Do you know if Canon upgrades their versions after new computer versions are released? Maybe I should wait??
I think you may be waiting for apple on this one. The way I read it canon isn't bothering to make osx 10.8 drivers for their old printers because apple is including them in the operating system. But they haven't done that one.
what it did say is that if you install it under 10.7 and then upgrade to 10.8 it will continue to work. I wont say that's a really smart thing to do going backwards just to get the printer working but that might be the only way to do it. I might try just downloading the driver for 10.7 and see if it works under 10.8
My old apple was version10.1 which I had upgraded to version 10.6.8. That is as high as I could upgrade it.
What version of printer driver upgrade can I use with the OS 10.6.8?
there is a driver for the 10.6