Mavericks install on MBR partition, is it safe?

Discussion in 'OS X Mavericks (10.9)' started by soundgals, Feb 26, 2014.

  1. soundgals macrumors newbie

    Joined:
    Feb 26, 2014
    #1
    Hi I'm new to Mac Rumours and decided to join because I saw similar posts on this subject.

    I was surprised to see the message that Mavericks couldn't install on my mid 2010 Mac Mini over Mountain Lion, because the internal HD is not using the GUID partition table. Then I read some posts here and elsewhere where it was explained that when Bootcamp has been used to install Windows a kind of Hybrid GUID/MBR partition table is created. The Mavericks installer doesn't recognise this as GUID.

    I've followed some instructions to create a Mavericks install bootable thumb drive, now I'm wondering if it's safe to try to use this to install Mavericks from there onto my internal HD.

    Firstly, I'm not sure if it will work at all. Then if it does, is it likely to be problematic? Am I likely to suffer to data loss or other problems?

    Of course, I'll make sure I have an up to date back-up first.

    Can anyone advise if I should even attempt this?

    Thanks,

    Geoff
     
  2. Quackers macrumors 6502a

    Joined:
    Sep 18, 2013
    Location:
    Manchester, UK
    #2
    The hybrid MBR created by Bootcamp should not have any effect on a fresh installation of OSX.

    What is it that you want to do exactly? Do you want to remove everything from your disc and start again?
     
  3. soundgals thread starter macrumors newbie

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    Feb 26, 2014
    #3
    I just want to install Mavericks over Mountain Lion. I don't want to start afresh and I want to keep my Bootcamp partitions for Windows.
     
  4. Quackers macrumors 6502a

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    Sep 18, 2013
    Location:
    Manchester, UK
    #4
    I'm afraid that's something I haven't tried, so can't comment further.
    I'm surprised that you're getting a message regarding an MBR disc though. If Mountain Lion is booting ok from the same disc then you must have a GPT disc (admittedly with a hybrid MBR, though that shouldn't be a problem afaik).
     
  5. soundgals thread starter macrumors newbie

    Joined:
    Feb 26, 2014
    #5
    Thanks. I'm still too nervous to try it :(

    Is this an attempt by Apple to gradually back away from support for running Windows, I wonder?
     
  6. Quackers macrumors 6502a

    Joined:
    Sep 18, 2013
    Location:
    Manchester, UK
    #6
    No, I wouldn't have thought so.
    You could always make a disc image of your system as it stands (with something like Clonezilla Live, or similar). At least you can recover it if something does go wrong.
     
  7. soundgals thread starter macrumors newbie

    Joined:
    Feb 26, 2014
    #7
    OK, thanks. I'll do that.
     

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