Installing windows bootcamp external HD rMBP

Discussion in 'MacBook Pro' started by Arpetee, Mar 20, 2013.

  1. Arpetee macrumors newbie

    Feb 10, 2013
    Hey all,
    I'm aware you are able to install Windows via a usb stick through bootcamp, however my question is whether you are able to install it from a USB external hard drive. I've loaded up a Windows 8 .iso on to my WD My Passport and tried to get it going through bootcamp, but every time I try I get "Your bootable USB drive could not be created."

    I have made sure the image is not mounted. Any ideas? Does it just not work on an external HD and have to be a flash drive? Thanks.
  2. swerve147, Mar 20, 2013
    Last edited: Mar 20, 2013

    swerve147 macrumors 6502a

    Jan 12, 2013
    If I recall correctly the external drive needs to be seen as a SATA device (i.e. it can't be USB). Essentially only a Thunderbolt drive can be used as a bootable drive into Windows. The process requires a small boot partition to be kept on the internal HDD/SSD but it can be done.

    I'm sure someone will correct me if I am wrong.

    EDIT: Here you go:
  3. Arpetee thread starter macrumors newbie

    Feb 10, 2013
    I'm not actually trying to install W8 ON the external drive. I'm trying to install it internally, just install it OFF the external. Exactly like one would do with a USB Flash stick. I just don't have a stick bigger than 4gb convenient.
  4. Arpetee thread starter macrumors newbie

    Feb 10, 2013
    Ok this is beginning to get quite frustrating. No one has any ideas?

    I've tried 2 different .iso's, my external HD, and a USB stick now as well. Same problem every time. Any input would be greatly appreciated.

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