Hi, I own a 2010 Macbook with iOS X 10.6.8 and the mouse has been acting up as of late. When I boot up my Mac it jumps around and when I log on and try and click something it either double clicks, doesn't follow the direction I need it to, or just does whatever it want to. I started this about a a year ago but was never this bad nor this constant. I don't know what's causing this, can anyone help?