Boot Mac Pro FRom USB Thumb Drive

Discussion in 'Mac Pro' started by captcurrent, Jul 10, 2012.

  1. captcurrent macrumors newbie

    Dec 15, 2008
    I have a Mac Pro 2.4 GHZ Quad Coew Intel Xon with 14 GB or memory

    I have 10.6 installed on a Verbatim 16GB USB Thumb Drive and a bootable image of the SL Installation Disk on a 8GB Scandisk USB Thumb Drive

    The pro recognizes them both as bootable but won't go beyond the grey apple.... no wheel no further boot .. any suggestions??
  2. paulrbeers macrumors 68040

    Dec 17, 2009
    Upon restarting your Mac Pro, are you immediately holding down the Option key to bring up the boot drive menu?
  3. captcurrent thread starter macrumors newbie

    Dec 15, 2008
    II have tried that and also from system preferences with same result
  4. bax2003 macrumors 6502a


    Dec 25, 2011
    If your USB ports are working fine, then you just did not format USB properly (GUID part table / boot.efi for example).
  5. captcurrent thread starter macrumors newbie

    Dec 15, 2008
    Nope they are formatted properly.. the issue turned out to be that the 2010 pro requires a minimum of 10.6.4 which renders the Retail disk or copies there of useless
  6. Truckee, Nov 1, 2014
    Last edited: Nov 1, 2014

    Truckee macrumors newbie

    Nov 1, 2014
    Mac Pro will not boot from any thumb drive

    I have an early 2008 Mac Pro. I have never been able to boot from a thumb drive with ML, Mavericks and now Yosemite. Setting the startup disk to the thumb drive results in a display of other bootable drives upon reboot. If I use the option key, the still connected thumb drive is ignored. For some reason even though the thumb drive is GUID, it is not displayed as the orange icon with their interface printed on it. The shape is the same but totally white with a black horizontal stripe on the bottom of it depicting the disk slot. Perhaps the h/w and/or firmware is too old to mount/boot from a thumb drive. I may try a new partition on one of my other 4 internal bay drives, but this seems like using a thumb drive is such a no-brainer. Except in my case. :)

    Note that I followed "Option 3 - Use Terminal" to create the bootable drive:

    About This Mac shows:
    USB Flash Memory:

    Product ID: 0x6544
    Vendor ID: 0x0930 (Toshiba Corporation)
    Version: 1.00
    Serial Number: CC52AF4C82E6CD914399B719
    Speed: Up to 480 Mb/sec
    Location ID: 0xfd100000 / 2
    Current Available (mA): 500
    Current Required (mA): 200
    Capacity: 31.02 GB (31,024,349,184 bytes)
    Removable Media: Yes
    Detachable Drive: Yes
    BSD Name: disk4
    Partition Map Type: GPT (GUID Partition Table)
    S.M.A.R.T. status: Not Supported
    Capacity: 209.7 MB (209,715,200 bytes)
    BSD Name: disk4s1
    Content: EFI
    OS X Yosemite Install:
    Capacity: 30.16 GB (30,164,586,496 bytes)
    Available: 23.69 GB (23,688,826,880 bytes)
    Writable: Yes
    File System: HFS+
    BSD Name: disk4s2
    Mount Point: /Volumes/OS X Yosemite Install
    Content: Apple_HFS
    Volume UUID: D0EA3143-C35D-3504-8EE6-A859EFC72EE1
    Capacity: 650 MB (650,006,528 bytes)
    BSD Name: disk4s3
    Content: Apple_Boot
  7. flowrider macrumors 603


    Nov 23, 2012
    ^^^^What happens when you go to Startup Disc in Systems Preferences? Is the USB Drive showing as a bootable device? If so, can you choose it, and then reboot?

    I have never had an issue booting from USB Drives on the built-in USB ports on a Macintosh.

  8. DeltaMac macrumors G3


    Jul 30, 2003
    How exactly are you creating a bootable thumb drive?
    Copying some random system files won't make it bootable - you'll just have data on the drive, and it won't appear as a bootable drive.
    Best method would be to actually install a fresh OS X system on that thumb drive (using whatever installer you want) - assuming you have enough space on the thumb drive. A full system install would probably need at least 10 GB.
    Another method would be a make a bootable thumb drive with the actual system installer. You can search for any one of a number of methods for helping do that - or you can use a utility that is designed to help, such as DiskmakerX.
  9. flowrider macrumors 603


    Nov 23, 2012
    That's the reason I told him to go to Startup Disc to see if the USB Drive was recognized as a StartUp Device.


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