Creating bootable OS X USB stick with multiple partitions

Discussion in 'Mac Basics and Help' started by MrGoldfish, Aug 26, 2012.

  1. MrGoldfish macrumors newbie

    Aug 8, 2011

    I have a 16 GB USB stick that I wish to divide into 2 partitions: 1 FAT partition to use both on my mac and on windows computers. I want the other to be an bootable Mountain Lion partition. I have managed to make the bootable OSX partition (with Lion DiskMaker) and thereafter make a FAT partition. The problem is that this wont mount on windows computers. I read that the FAT partition needs to be first in order for windows computers to mount them. I have been trying around with the disk utility but it will not do as I ask it ;).

    Any suggestions on how I could manage this problem?
  2. r0k macrumors 68040


    Mar 3, 2008
    You can't do this. To be bootable a USB stick must use the GUID partition table which Windows doesn't know what to do with. If you want windows to see the stick, you have to use Master Boot Record which Windows can understand but a Mac cannot boot from.
  3. mfram macrumors 65816

    Jan 23, 2010
    San Diego, CA USA
    Windows 7 can read GUID partition table. What version of Windows are you using?

Share This Page