New to Mac. Really disappointed so far. The very first thing I touch each time I start another session of trying-to-get-used-to-it is the mouse. And it sucks. I'm not sure I can explain it. It doesn't seem do have a one to one ratio in the amount moved on the pad as compared to the screen . . . or something. Very sluggish feeling. Have to pick it up and go back to the top of the pad for another "bite" if I'm going to scroll very far. Have tried adjusting it in preferences. Searched before posting but couldn't find anything very recent. I can't believe there isn't a solution. No one would ever get used to this. Like trying to drive a car with the steering working backwards. Just goes against human nature. Would love to lay down cash for a new one and forget about it but don't want to buy another one to find out it isn't the mouse itself but the computer. I can't help but think it has something to do with the absence of a ball. Has a light instead. I swear I think I'm going to send this thing back. A shame that I can't even get passed the mouse in my efforts to get used to this thing.