Installing/Booting from USB drive

Discussion in 'macOS' started by /user/me, May 22, 2011.

  1. /user/me macrumors 6502

    Feb 28, 2011
    Hello All, I was having some problems trying to run the from my flash drive. When i boot from it, it has the grey screen with a circle and a slash. from my research, I found out that this is from it not being able to find the boot.efi folder. Where in the package do I drop this file, Thanks :)
  2. simsaladimbamba

    Nov 28, 2010
    What Mac OS X version do you use? And where did you get it and how did it get on the USB flash memory thumb drive?
  3. /user/me, May 22, 2011
    Last edited: May 22, 2011

    /user/me thread starter macrumors 6502

    Feb 28, 2011
    Right now i'm trying to get Snow Leopard on my older laptop, 2007 mbp, dvd drive is broken. I got it from my snow leopard disc that I bought about two weeks ago. I used disk utility to format my USB drive as a bootable volume, then restored it with the disk image that I copied of SL. The image of SL is 10.6.6.
  4. wrldwzrd89 macrumors G5


    Jun 6, 2003
    Solon, OH
    This error could be caused by the partition table for the USB drive not being set to GUID Partition Table (GPT) in Disk Utility. Do you know how to check the partition table format of a disk in Disk Utility?
  5. /user/me thread starter macrumors 6502

    Feb 28, 2011

    Yep, Thats what it was set at. I made a new image today just to be sure.

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