Hello there, I've just registered and so this is my first post. I bought an imac 2.8 GHz Intel Core 2 Duo 2GB 800 MHz DDr2 SDRAM and although I know there are better things to play with... I ended up playing with it. Later on I ugraded to OS X 10.6.7 and all of a sudden the mouse won't work at all, I normally use a tablet but if I do, the cursor goes like crazy out of the screen if I move it less than an inch. First I thought it was the game, but it happens with all the games; Halo, CoD4... So I google it up for several days and couldn't find anything, I changed the screen values in the preferences pane, the speed of the mouse, sensibility, accesibility... long story short, I'm frustrated. please help, I know I'm to old for it but I miss playing 