i have to say that you should get a logitech mouse - i use a cordless G7 - it works about a million times better than the peice of crap i got with my MP. It actually started squeaking after only one month of use - limited CAD work adn playing COD2. Seriously - it squeaks when you left click!
I have the G7 it running on OSX with no problems!
yeah its pretty - but so is a mannequin...