So ive got an old ms arc mouse that says right on the box (compatible with mac/osx) Weird thing is, the mouse is utter **** in osx, works find in bootcamp, installed mouse drivers as well in osx, didnt work. Its kinda hard to explain, but its like the mouse stutters, and stops and lags from time to time, tried it with 3 other pcs today, no problem. I have read on apple support forums, and it seems people are having problems aswell, also with apple mouses. So any fix for this? kinda sad to play sc2 beta with a mouse that lags/stutters like hell.