I've formatted my old laptop in order to install Lion 10.7.3 version on it. During the installation process it came up with a weird looking error message, similar to the one in the next picture:

Install Failed - Mac OS X could not be installed on your computer

I'm wondering what's causing this issue and what can I do in order to solve the problem. It's a bit hard for me, a veteran Windows user, to get along with this type of OS.

Thanks in advance.

  • It is the same issue as format c: failing the disk is broken
    – mmmmmm
    Aug 19, 2013 at 18:55
  • 1
    The explanation is in the error message: damaged disk. What's the doubt?
    – brasofilo
    Aug 19, 2013 at 19:23
  • 1
    It worked just fine on the third try, there was nothing wrong with the disk. Thanks anyway. Aug 19, 2013 at 22:14

1 Answer 1


The error message "Mac OS X Lion couldn't be install, because the disk Macintosh HD is damaged and can't be repaired." in the photo above would indicate that there is either a problem with the physical hard drive of your Mac or the Mac's "Macintosh HD" volume is damaged at a software level.

While you're in the installer you can click on Window > Installer Log to view a log from the Lion installer. This may give you some clues as to what is causing the error. For instance, any mention of "Disk I/O Error" would be an indicator that there is a communication problem with the hard drive at a hardware level.

You can also attempt to repair the Macintosh HD volume using Disk Utility (should be accessible from the Lion installer's Utility menu), or reformat it again if the repair fails. Once repaired or reformatted you can attempt the installation again.

Hopefully that helps.

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