Can't install ML. Disk used for time machine

When I choose my machintosh HD drive to install mountain lion says "This disk is used for time machine backups". HELP!!!

Although this may be too late for the OP, here's the answer: If you see a Backups.backupdb folder on your main harddrive, either remove it or rename it. That seems to be the only qualifier for calling a disk a Time Machine Backups disk as far as the installer is concerned.

Similar Messages

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

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    From the Finder's Go menu, choose Computer:
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    Look for this folder:
    Drag it to the Trash.

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    Maybe this http://support.apple.com/kb/TS2986 can help you.
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    I am trying to upgrade our MacBook to Snow Leopard, but when prompted to select which hard drive to install on and "Macintosh HD" is selected, the following message generates: "Mac OS X cannot be instaled on  'Macintosh HD'. This disk is used for Time Machine backups."
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    Check to see if you have a folder named "Backups.backupdb" at the root level of your hard disk. That can cause this error message.

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    Also see these discussions.
    https://discussions.apple.com/message/19033168#19033168
    https://discussions.apple.com/message/15699444#15699444

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    "Backups.backupdb" if the file in Time Machine.  As the discussion says, you have to find that file and trash it.  Try spotlight to locate it.  If that does not work, down load OmniDiskSweeper from the Internet (free) and go through an organized search to find "Backups.backupdb".  If that takes too long or is too tedious, then if you have everything backed up, erase the HDD and start from square one.
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  • I am getting error "The disk is used for Time Machine Backup" when installing the new OSX Mountain Lion upgrade"

    I am keep getting this error "The disk is used for Time Machine Backup" when installing the new OSX Mountain Lion" when doing the upgrade to newly OS.

    The folder would be at the root of your hard drive. Double-click Macintosh HD and look there.
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