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Mountain Lion won't install.

863 Views 8 Replies Latest reply: Jan 9, 2013 3:38 AM by Imp68 RSS
29asimla Calculating status...
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Jan 8, 2013 6:02 PM

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)
  • nolaness Calculating status...
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    Jan 8, 2013 7:07 PM (in response to 29asimla)

    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???

  • Imp68 Level 4 Level 4 (2,135 points)
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    Jan 8, 2013 7:34 PM (in response to 29asimla)

    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.

  • nolaness Level 1 Level 1 (0 points)
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    Jan 8, 2013 7:53 PM (in response to Imp68)

    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?

  • Imp68 Level 4 Level 4 (2,135 points)
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    Jan 8, 2013 8:01 PM (in response to nolaness)

    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.

  • macjack Level 9 Level 9 (50,445 points)
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    Jan 8, 2013 8:21 PM (in response to 29asimla)

    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

  • nolaness Level 1 Level 1 (0 points)
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    Jan 8, 2013 8:55 PM (in response to macjack)

    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.

  • Imp68 Level 4 Level 4 (2,135 points)
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    Jan 9, 2013 3:38 AM (in response to 29asimla)

    You're very welcome - glad it worked out.

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