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  1. #1

    Member Since
    Jun 26, 2012
    Question Mountain Lion: Clean Install or Upgrade on mid 2012 MBP?
    Hey guys, I have a new 2012 13" Macbook Pro that I purchased about a month ago. Ive been reading the forums and have found a lot of people doing a clean install of Mountain Lion as opposed to an upgrade. Do you think this is necessary for such a new machine? Should I do a clean install and use migration assistant to bring back my (small amount) of old files, or just upgrade to ML?

    Also, if anyone could touch on the merits of creating a USB thumb drive bootable Mountain Lion copy it would be greatly appreciated. From what I understand, my MBP has a partition in the hard drive that works as a backup copy of the OS.
    Will this OS repair partition update to ML once it is installed? Thanks for the help!

  2. #2

    Member Since
    Mar 09, 2011
    mbp 15 2009, mbp 13 2010
    you can do an upgrade, the link will take care all your questions, the link is here how to do it
    OS X Mountain Lion: The Mac-Forums Guide | Mac-Forums Blog

  3. #3

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Nambucca Heads Australia
    iMac i5 2.7GHz, 16GB memory, OS 10.11
    As a suggestion prior to running the installer make a bootable USB thumb drive. Then run the installer. Thumb drive needs to be over 4GB. Lion Diskmaker, which is donationware, does the trick.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

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