USB Flash drive boot up

Discussion in 'OS X Mavericks (10.9)' started by airmax32, Oct 27, 2013.

  1. airmax32 macrumors member

    Apr 25, 2013
    I just plan to make a backup of mavericks just in case I need to reformat my mac again. Would an 8GB USB flash drive do the job?
  2. BasicGreatGuy Contributor


    Sep 21, 2012
    In the middle of several books.
  3. dmrowley macrumors 6502


    Aug 4, 2010
    Dortches, NC
    Yes, and give this a whirl. It worked great for me...
  4. tywebb13 macrumors 68020

    Apr 21, 2012
    Or you could do it Apple's way. Apple made something in the installer called createinstallmedia which does it for you:

    Your 8 GB USB drive should be called Untitled and formatted as Mac OS Extended (Journaled). The installer should be called Install OS X and should be in your Applications folder.

    After downloading Mavericks from the Mac App Store, run this in terminal and wait about 20 minutes:

    sudo /Applications/Install\ OS\ X\ --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ --nointeraction

    You should see something like this:

    Erasing Disk: 0%... 10%... 20%... 100%...
    Copying installer files to disk...
    Copy complete.
    Making disk bootable...
    Copying boot files...
    Copy complete.

    You can then boot up from the USB by holding down the option key, then install Mavericks from the USB.

    Note that this will also install a recovery partition.

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