I finally switched over to Mac's and I'm extremely happy with my purchase But the only problem that I've found is that in Stepmania (DDR simulator), I can't press more than 2 of the arrow keys at once. Some of the songs require 3, or even 4 to be pressed down at once. I tried with WASD and same issue. I would think that for a $2k laptop, there would be a 3 or 4 key rollover on the keyboard. Normally this problem is a hardware issue, but I was hoping that in the case of a Mac it wasn't. Could someone shed some light on this issue, and also suggest a combination of keys similar to the arrow Keys or WASD which allows all four, or even 3, of the keys to be pressed at a time.