Booting off USB 3.0 thumb drive not supported?

iBug2

macrumors 601
Original poster
Jun 12, 2005
4,027
201
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.
 

axu539

macrumors 6502a
Dec 31, 2010
929
0
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.
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.
 

iBug2

macrumors 601
Original poster
Jun 12, 2005
4,027
201
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.
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.
 

AzN1337c0d3r

macrumors 6502
Sep 13, 2010
448
1
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.
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.
 

g4cube

macrumors 6502a
Apr 22, 2003
760
13
Make sure to change the MBR partition scheme and FAT32 format to GPT or Apple partition scheme.

You can do this with Disk Utility.
 

ColoArtist

macrumors 6502
Jul 3, 2012
257
114
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.

:apple: