Booting off USB 3.0 thumb drive not supported?

Discussion in 'MacBook Pro' started by iBug2, Aug 4, 2012.

  1. iBug2 macrumors 68040

    Jun 12, 2005
    I bought a Lexar Triton USB 3.0 thumb drive for my rMBP and tried to boot from it with no luck. The computer basically freezes on the boot and nothing happens. If I boot with option pressed and then plug the thumb drive, same thing happens. The EFI boot screen freezes.
  2. axu539 macrumors 6502a

    Dec 31, 2010
    I have booted a 2011 MBP off of a USB 3.0 drive (using USB 2) before just fine. It could potentially be the rMBP misbehaving, though.
  3. iBug2 thread starter macrumors 68040

    Jun 12, 2005
    Well, I can boot the rMBP using a USB 2.0 drive as well, but I haven't tried if I can boot another USB 2.0 mac using a USB 3.0 drive though, I'll test it.
  4. AzN1337c0d3r macrumors 6502

    Sep 13, 2010
    It appears the rMBP doesn't like certain USB thumb drives for booting. I can reproduce this issue all day long on a Corsair GT USB 3.0 16 GB.

    However, it does seem to work with my Corsair USB3.0 32 GB, so I know it's not the method that I'm using to make the thumb drive.
  5. g4cube macrumors 6502a

    Apr 22, 2003
    Make sure to change the MBR partition scheme and FAT32 format to GPT or Apple partition scheme.

    You can do this with Disk Utility.
  6. ColoArtist macrumors regular

    Jul 3, 2012
    Denver, CO
    I built a bootable Mt. Lion drive on an old Transcend 2.0 Flash drive I had around. It worked just fine.

    Thinking a 3.0 drive would be better, I bought a new Transcend 8GB JetFlash700 Super Speed USB 3.0. It works just fine too. :)

    The extra speed of the 3.0 didn't really seem to make much difference. A 2.0 Flash drive is probably more than sufficient even for an installation.

  7. mjn298 macrumors regular

    Oct 25, 2011
    Palisades, Washington, DC
    I have gotten the no smoking sign a few times trying to do a clean install, sometimes I randomly don't. Not sure why.

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