Hello, I recently bought a new 320 gig hard drive for my white MacBook 13" - as the original 80 gig hard drive is proving rather small. I followed the the instructions on replacing the hard drive, and loaded up the OSX installation disc, the only problem is that Disk Utility doesn't recognise the new hard disk, however, if I go into System Profiler, it shows up under Serial ATA as my primary hard disk. I have tried taking it out and putting it back in again but to no avail, i've since put my old hard drive back in and its loaded fine (i'm using this at the moment). I understand that the new drive would need to be formatted but the only way this seems possible to do it is by reformatting it via Disk Utility. any ideas or help would be appreciated?