I had read somewhere that if you were to put the date on your mac before December 2007, that you would be able to install boot camp beta. I downloaded the installer and as I am partitioning my disk my computer comes up with a grey screen saying I have to manually restart. So I hold down the power button and when I try to partition again once I turn the computer back on, it says that the hard drive is damaged. I go to disk utility and I repair the permissions, but the repair button for the disk is shaded out. How do I repair my disk?