Bootcamp: Your bootable USB drive could not be created

Discussion in 'OS X Mountain Lion (10.8)' started by Joe91, Apr 17, 2013.

  1. macrumors newbie

    Joined:
    Jul 16, 2009
    #1
    Hello all,

    So trying to install Windows 7 on my new Macbook Pro, and having an error: "Your bootable USB drive could not be created. An error occurred while formatting the disk".

    I am using a USB formatted as Mac OS journaled, with GUID Partition Table. I have Googled the problem and some reported that unmounting the Windows iso file did the trick, but hasn't worked for me.

    I've tried multiple USB drives (some 8GB, some 16GB) and nothing works - I've reformatted them all and still no joy.

    Is anyone able to help?

    Cheers
     
  2. macrumors newbie

    Joined:
    Apr 16, 2013
    #2
    Does it ask you to specify which .iso file ?

    It auto-selects the first .iso it finds, so if you have any other .iso files on your computer, it might be selecting the wrong one
     
  3. macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #3
    You're Restoring a WIndows bootable disc on a Flash drive formatted for Mac Extended (journaled) with a GUID partition table?

    Two things that could be wrong (last to first):
    1. The partition table must be MBR.
    2. partition must be formated as MS-DOS (FAT) or ExFAT.
     
  4. thread starter macrumors newbie

    Joined:
    Jul 16, 2009
    #4
    Yep, when prompted, I always manually direct it to the correct ISO file.

    I watched a video on Youtube where it recommended Mac OS Journaled/GUID Partition table combination. There were no comments suggesting those settings were bad, so I assumed they were the ones to try.

    I just formatted one of the USBs to ExFAT with MBR partition table (1 partition), and had the same problem. Hmm.
     
  5. macrumors newbie

    Joined:
    Apr 16, 2013
    #5
    I'm assuming your computer doesn't have a disk drive
     
  6. thread starter macrumors newbie

    Joined:
    Jul 16, 2009
    #6
    Unfortunately not - should I buy a SuperDrive, burn the iso to a DVD, and try and install via that method?
     
  7. macrumors newbie

    Joined:
    Jun 11, 2013
    #7
    This might be too late to help the OP, but make sure you have not mounted the ISO file. I was having the same exact issue and ejected the iso file and was able to then write the files to the USB drive
     
  8. macrumors newbie

    Joined:
    Jul 11, 2013
    #8
    I was having this same issue, but my ISO was definitely not mounted. It turned out to be an issue with the ISO file, even though it was ripped straight from the DVD. I just downloaded a new file (google "windows 7 iso") and it worked straight away.

    w7forums has the iso I used. It seemed like a more legit way than downloading from a torrent, as they are trial ISOs that you just need to register with your valid key upon installation.
     
  9. macrumors newbie

    Yuvraaj Singh Rahal

    Joined:
    Jun 11, 2015
    #9
    HOLY S*IT! THAT WAS THE PROBLEM! It was selecting the one in downloads folder, but my ISO file was on the dekstop! OMFG! THANKS MAN!
     

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