Regarding zensui's suggestion that you may find your answer on the Canon/Europe page ... True, that is where to find what you
need from Canon. But I just looked for what you need and "Canon speaks with forked tongue." On the page where they offer a download for a PDF Advanced Guide for the 8180C (
http://software.canon-europe.com/software/0026356.asp?model=), they specifically
DO list "Mac OS X" along with Windows OS's. But once you download the guide and check the specs (
http://software.canon-europe.com/files/soft26356/manual/MF8180CUGEN.PDF), you find a complete listing of the 8180C's specs: No mention of compatibility with Mac OS X.
If you had just bought the MF unit (no pun intended, but accurate nonetheless) I'd say Canon clearly misrepresents the 8180C's OS compatibility: Grounds for a return/refund at minimum (actually constitutes a violation of several states' (USA) consumer protection statutes). But you do say the new Mac joins "an existing" Canon 8180C, so ...
I'll say this: Stuff like this really
***s me off! Enough to track this down, even though it isn't my own issue.