Error: Mac OS X could not be installed on your computer Mac OS X can't be installed on the disk Macintosh HD, because a recovery system can't be created. Visit www.apple.com/support/no- recovery to learn more. Click Restart to return to your previous version of Mac OS X. I get this when upgrading from an existing 10.7 Preview 4 OS. I am partitioned two ways, one for Macintosh HD and another for Windows. Had no problem on my iMac or MBP, but my Macbook 2,1 seems to not like this... Put in the Snow leopard retail disk to verify / repair permissions and the disk, but it didn't fix this. Anyone else have this problem? If so, how did you fix it? A fresh install / format of the drive is totally a last resort.