Some ( AVCHD) Camcorders and a few older SD HDD camcorders had Mac compatibility issues .. not MinIDV
AFAIK:
The other issue is of course the well known (somewhat) limited Mac Software scenario.
In the case of the SD HDD it
was simply drivers for transfer via USB from camcorder rather than incompatibility of video format
A less talked about analogy is the Windows Vista "issue" where a lot of things work until you suddenly hit a wobbly and realise it isn't Windows XP all dressed up!