Bootcamp: "Your bootable USB drive could not be created"

Discussion in 'macOS' started by NervousFish2, May 31, 2018.

  1. NervousFish2 macrumors regular

    NervousFish2

    Joined:
    Mar 23, 2014
    #1
    Gentle people,

    I am getting this message, "Your bootable USB drive could not be created," when I try to set up a bootcamp installer, in Bootcamp Assistant.

    I have a 2017 iMac "27 inch. I am using 32 gb USB 3.0 drive, formatted in MS-DOS (FAT) with a "Master Boot Record" scheme.

    I understand (from various internet searches) that this message was common a few years ago, when people were working from CD installers. But I am working from an ISO downloaded directly from Microsoft. I did try an experiment, and I can get Parallels to install. But I do need Windows to boot in Bootcamp.

    If anyone has any tips, I'd be grateful.

    Also, I think this is my 100th MacRumors post! Woohoo!
     
  2. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #2
    Some ISOs work and others don't; I had one from MSDN and it wouldn't accept it. As far as I can tell you need to use a "normal" ISO if you aren't already.
     
  3. NervousFish2 thread starter macrumors regular

    NervousFish2

    Joined:
    Mar 23, 2014
    #3
    Thanks. So, this is the 64-bit one I downloaded from Microsoft's website, here... Should I have tried the 32-bit version?

    https://www.microsoft.com/en-us/software-download/windows10ISO
     
  4. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #4
    Both versions should work, as far as I'm aware. In fact, I think on some machines you need the 64-bit version.

    Those are normal ISOs so it's not the same problem that I ran into. Maybe Boot Camp needs an update to handle the 1804 version...
     
  5. Demigod Mac macrumors 6502a

    Joined:
    Apr 25, 2008
    #5
    Definitely stick with 64-bit. 32-bit will cap memory usage to 4 GB.

    If you can borrow someone's Windows PC for a moment, I'd suggest using Microsoft's Windows 10 Media Creation tool to make the USB installer instead of going the ISO route.
     
  6. NervousFish2 thread starter macrumors regular

    NervousFish2

    Joined:
    Mar 23, 2014
    #6
    Thanks. Will do!
     

Share This Page