I have Mac pro about two months old. I am having problem with my Mac pro When I remove the betray charger, system running very slow and when I cannot charger it will run normal. I believe there is some problem please help me to fixed this I would like to give more details about my macbook pro. I have mac os x version: 10.6.3 model idendifer: macbook pro 7,1 processor speed: 2ghz and i do have warranty. This macbook is only two month. so kindly requst to advice me why my macbook is running slow when i remove the charger.