Hi folks I'm getting the "Mac OS X cannot be installed on this computer" after the initial stages of the install process. Its a MBP 2.33processer, 2GigRAM and was bought at the start of 2007. It's defo not the spec of machine, so must be the discs. The 10.5 discs came with another mac, exactly the same spec of machine, so the discs are defo MBP. Anyone have any ideas why I can't upgrade?? Do I have to select the "Erase and Install" option in the install options? Is it space on my hard drive. (Only 14gig left, but I would assume it would tell me thats the problem. Also the disc version is 2Z691-6150-A for disc 1 and 2Z691-6175-A for disc 2. Any ideas anyone? . . . . .