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987 Views 21 Replies Latest reply: Jul 29, 2012 7:39 AM by GM1941 RSS
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GM1941 Level 1 Level 1 (10 points)
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Jul 28, 2012 8:41 AM

I was not a able to install Mountain lion.  Got a message that my drive was not guild.  I had 3 partitions, Mac HD, Boot Camp, and a Shared drive.  I could not repartition, options tabs were grayed out.  I deleted the Boot Camp drive and the shared.  Left with one Mac HD drive.  It was guild. I could not repartition this drive because it said it could not "unmount". I do not have my install/back up drive anymore.  Not sure where it went.  Now when I try to install Mountain Lion it just hangs up.  Can't seem to reinstall from my time machine either.  My machine is working fine otherwise.  Any ideas how to approach this?

 

I have a 15" Macbook pro with all the current updates of 10.7.4.

  • Barney-15E Level 7 Level 7 (33,550 points)
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    Jul 28, 2012 8:54 AM (in response to GM1941)

    Were you booted into the Recovery HD when you attempted to do all of this, or in the Mountain Lion Installer, or just in Disk Utility from your Applications/Utilities?

  • Barney-15E Level 7 Level 7 (33,550 points)
    Currently Being Moderated
    Jul 28, 2012 9:08 AM (in response to GM1941)

    Can you repair the disk?

    When you select the disk, not the volumen, does it say it is GUID Partition Table?

  • Knoddix Level 1 Level 1 (125 points)
    Currently Being Moderated
    Jul 28, 2012 9:19 AM (in response to GM1941)

    IF you are not concerned about the data on the drive open disk

    UTility from recovery HD then select the disk above Macintosh hd

    THen erase it using the format Mac os extended journaled that should force a guid

    Partition then close disc utility then try install os x if that fails and you have a Mac introduced

    IN 2011 or later boot to Internet recovery by holding command option and r

    WHen u first turn on the Mac and repeat the above mentioned steps

    NOte : internet recovery method may result in a lion not mountain lion install but as least it will be bootable

  • Knoddix Level 1 Level 1 (125 points)
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    Jul 28, 2012 9:29 AM (in response to GM1941)

    OK did the machine come with lion or snow leopard ?

  • Knoddix Level 1 Level 1 (125 points)
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    Jul 28, 2012 9:37 AM (in response to GM1941)

    ARe the options under the partition tab greyest out as well or do you have a snow leopard install DVD

    BEcause the other thing you could do is boot to the snow leopard disc then install that then update to 10.6.8 then download mountain lion installer from the AppStore and at that point I would suggest creating a mountain USB installation drive before installing mountain lion again I know this way is the long way but in theory it would work

  • Barney-15E Level 7 Level 7 (33,550 points)
    Currently Being Moderated
    Jul 28, 2012 12:30 PM (in response to GM1941)

    GM1941 wrote:

     

    Yes I can repair the disk.  The volume says it is GUILD the disk/drive does not show map scheme.

    With the disk selected, here is what you should see in the lower part of the Disk Utility Screen:

    Screen Shot 2012-07-28 at 2.28.23 PM.png

    Does it not show: Partition Map Scheme: GUID Partition Table ?

  • Knoddix Level 1 Level 1 (125 points)
    Currently Being Moderated
    Jul 28, 2012 2:19 PM (in response to GM1941)

    SElect the grey rectangle above Mac had and see if the options under the erase tab are still greeted out

  • Knoddix Level 1 Level 1 (125 points)
    Currently Being Moderated
    Jul 28, 2012 2:22 PM (in response to GM1941)

    SElect the grey rectangle above Mac hd and see if the options under the erase tab are still greyed out

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