i am trying to sell my mac book pro, so i put the mac osx cd in my computer to erase the drive using the disk utility. then when it was done i went to go reinstall osx it fails after a few minute. does anyone have any suggestions? i have tried reinstall a few time now with no success. also i went to the disk utility and tried verifying and repairing the disk the error it give me is "the installer could not copy the necessary support files"