8 Replies Latest reply: Jan 9, 2013 3:38 AM by Imp68
29asimla Level 1 Level 1 (0 points)

Hi. I just ownloaded Mountain Lion but can't get it to install. After accepting the User T&C I get aske whwt rive it's to be installed on with the only option being Macintosh HD. If I select that isc I get an error message (as in a speech bubble) saying "This disc is used for Time Machine backups" and it won'd let me o any more. I've made sure Time Machine is off (I don't use it on this computer anyway), and I've restarted about 6 times but nothing changes. Can anyone help?


MacBook Pro, Mac OS X (10.6.8)
  • 1. Re: Mountain Lion won't install.
    nolaness Level 1 Level 1 (0 points)

    Sorry no answer here because I have THE EXACT SAME PROBLEM! I haven't restarted or anything, but I'm at a loss for what to do. I had originally installed ML on my Mac Book Pro a while back- no problems. The computer I'm trying to install on now is an older model, but already has Snow Leopard, and meets the specs.

     

    Can anyone help both of us out???

  • 2. Re: Mountain Lion won't install.
    Imp68 Level 4 Level 4 (2,155 points)

    Open Finder.  Click the Go menu, then Computer.  Double click Machintosh HD in Finder.  Do you see a folder named backups.backupsdb?  If so, trash it, reboot, try again.

     

    Just be sure there are no backups in it to be concerned with.

  • 3. Re: Mountain Lion won't install.
    nolaness Level 1 Level 1 (0 points)

    I went into Finder/Go/Computer and double clicked Macintosh HD- I didn't have a folder nambed backups.backupsdb. Is it supposed to automatically be there?

     

    I rebooted anyway, but still have the same problem.

     

    Where else would I install Mountain Lion if not on the Macintosh HD drive?

  • 4. Re: Mountain Lion won't install.
    Imp68 Level 4 Level 4 (2,155 points)

    If you're getting the same error message, it's because at some point Time Machine did a backup to your startup disk.  The backups.backupsdb folder is normally what the Time Machine backup folder is called.  The trick may be finding and trashing the backup folder from your start disk.  I'm not sure it's specifically your problem, but ive seen this many times before.

     

    You could also try trashing the com.apple.timemachine.plist file in /Library/Preferences, but I don't think that will help.

  • 5. Re: Mountain Lion won't install.
    macjack Level 9 Level 9 (50,510 points)

    Launch Disk Utility > How many volumes do you have on your HDD?

    This would indicate 1 volume, the top being you entire hard drive and the indented the Volume

    by default 2013-01-08 at 8.15.55 PM.jpg

    Here is a disk with 3 Volumes...

    by default 2013-01-08 at 8.18.38 PM.jpg

    Also see...

    http://support.apple.com/kb/TS2986

  • 6. Re: Mountain Lion won't install.
    nolaness Level 1 Level 1 (0 points)

    I've been looking for any backup folders, but there doesn't seem to be any. I have 1 volume (as per the image above), and I suppose I could back up everything onto an external HD, however I don't have a dedicated partition handy; I'll get another hard drive in order to back everything up at least once.

     

    Does this include a shared iTunes library, or any other shared info between computers? My main computer is a Mac Book Pro).

     

    Thanks for your help-- I'll try again tomorrow.

  • 7. Re: Mountain Lion won't install.
    29asimla Level 1 Level 1 (0 points)

    Thanks - I found and trashed the backup folder and all is now well! Really appreciate the input from you an from all the others!

  • 8. Re: Mountain Lion won't install.
    Imp68 Level 4 Level 4 (2,155 points)

    You're very welcome - glad it worked out.