i think i'd avoid this camera like a small plague if i were you... ok, so it's not THAT bad but for what it costs, i think it's WAY over the top...
i'm ASSUMING that you can do either platform with it because Sony's Mac suppport is pretty nifty thus far, but I think the official party line is that you arent supposed to use mini CD's in slot-loading iMacs...
the camera isnt that speedy because it hasta record each image to the CD, and although you can do multi-sessions of sorts, you cant put the disc in your computer until it's written-out...which takes time, battery life, etc...
look at one of the 4 megapixel or so Cybershots that use Mammary Sticks and a USB interface...or other brands that use Compact Flash cards...more bang for the buck in my opinion, AND ease of use...
:ryan