Make a bootable USB drive for OS X Mavericks installation








  1. Download OS X Mavericks from app store. It will be installed to /Applications/Install OS X Mavericks.app
  2. Format your USB drive(You need at least 8GB capacity.) as Mac OS Extended (Journaled). It will be labeled as Untitled by default.
  3. Run the following command in Terminal to clone Mavericks to the USB drive:
    sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Mavericks.app --nointeraction
    It will take up to 90 minutes to complete. In the Terminal window, you should see the progress information like below:
    Erasing Disk: 0%... 10%... 20%... 100%...
    Copying installer files to disk...
    Copy complete.
    Making disk bootable...
    Copying boot files...
    Copy complete.
    Done.



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