Hi Everyone, I have macbook pro 2.66 Ghz Intel Core Duo 4 GB Ram Running OS 10.5.8 I'm trying to update to 10.6 snow leopard to update to mountain lion to download itunes 7 so I can sync my new iphone 5 When try to install snow leopard from a disc and it's telling my computer can't do it. I find this taxing as I meet the system requirements. My Macbook pro is only 3/12 years old. Any solutions to this problem or causes as why it will not allow me to update my OS???