11 Replies Latest reply: Feb 7, 2013 11:43 AM by Kurt Lang
Sacdia Level 1 Level 1 (0 points)

I started off with Snow Leopard and then a pirated Lion was installed by a friend. I have been using that Lion until recently where it became corrupted. Considering that only the OS is corrupted and not the harddrive, will the problem be solved if i install Mountain Lion from the itunes store or do i have do downgrade it back to snow leopard first?


MacBook Pro, Mac OS X (10.7.5)
  • 1. Re: Corrupted OS
    keg55 Level 5 Level 5 (5,925 points)

    You can install ML over Lion. Not sure about a pirated copy of Lion, though.

  • 2. Re: Corrupted OS
    Kurt Lang Level 7 Level 7 (31,995 points)

    Since the drive is already corrupted, it won't do you any good to install ML over it since it will still be corrupted. It could easily make things worse.

     

    Your only real solution is to reinstall Snow Leopard, which will require erasing the drive since you can't install it over Lion. After you've updated SL to 10.6.8 via the Combo Updater, you can then purchase Mountain Lion in the App Store.

  • 3. Re: Corrupted OS
    Sacdia Level 1 Level 1 (0 points)

    Im not sure about this but i was told that my harddrive isnt corrupted which is also why i can still use my mac.

  • 4. Re: Corrupted OS
    keg55 Level 5 Level 5 (5,925 points)

    If you're unable to purchase and install ML over your prirated Lion install; then your only option is the 2nd paragraph of Kurt Lang's post.

     

    Curious if you tried booting into your Lion Recovery HD (assuming it has one) and tried to reinstall Lion. You would most likely be prompted for an AppleID and password so it can verify your purchase which may keep you from being able to download and reinstall OVER your existing install.

  • 5. Re: Corrupted OS
    Kurt Lang Level 7 Level 7 (31,995 points)

    Im not sure about this but i was told that my hard drive isn't corrupted which is also why i can still use my mac.

    Too literal. The hard drive itself can't be "corrupted". It can suffer physical issues to the mechanisms or other problems with the hardware itself. All hard drives eventually die. It's not a matter of if, but when.

     

    The files on the drive are what's corrupted. So yes, you can still use the drive, but you can't really fix the data on it without erasing the drive and starting over. Backup whatever personal data you need to save. Then erase the drive, install SL, then upgrade legally to ML (it's only $20). Then restore your personal files.

  • 6. Re: Corrupted OS
    Sacdia Level 1 Level 1 (0 points)

    Im not quite getting the second part. Do you mind rephrasing it?

  • 7. Re: Corrupted OS
    Ralph Landry1 Level 7 Level 7 (32,515 points)

    Kurt is telling you that there are files on your hard drive that are damaged, fragmented, corrupted content.  Since you cannot tell exactly which files are damaged the only solution that will work is to copy your data files to another drive for restoration later.  then erase the hard drive so you remove all damaged files.  Install a clean copy of the legal Mac OS X that you have, Snow Leopard.  On-line upgrade to 10.6.8, the latest version of SL.  Then go to the Mac App Store and for $20 download and install Mountain lion.  After that is done you can copy your data files and purchased applications back to the internal hard drive.

  • 8. Re: Corrupted OS
    keg55 Level 5 Level 5 (5,925 points)

    Have you tried rebooting into the Lion Recovery HD then select the Reinstall OS X Lion and reinstall Lion on top of itself? No data or apps will be harmed as you're simply reinstalling Lion over itself. And I don't know if you will be prompted for an AppleID and password before you can download and install Lion.

     

    Restart and hold down the COMMAND+R keys to see if it boots into the Lion Recovery HD. Or restart and hold down the OPTION key; then select the Recovery HD to boot into.

  • 9. Re: Corrupted OS
    Sacdia Level 1 Level 1 (0 points)

    Im really tempted to try that but like what kurt mentioned, i should probably just install SL and get ML.

     

    Thanks for the help!

  • 10. Re: Corrupted OS
    keg55 Level 5 Level 5 (5,925 points)

    My pleasure and good choice on what you should probably do.

  • 11. Re: Corrupted OS
    Kurt Lang Level 7 Level 7 (31,995 points)

    You could, but you would be in same situation as trying to install ML over Lion. The data on the drive is still corrupted, and trying to reinstall the current OS over it could actually, and probably would, make things worse.