EFI install of Windows 10 on external USB3 drive.

Discussion in 'Windows, Linux & Others on the Mac' started by Gjwilly, Aug 23, 2015.

  1. Gjwilly macrumors 68030

    Joined:
    May 1, 2011
    Location:
    SF Bay Area
    #1
    I tried to follow the guide above using a 2013 MacBook Air and a VMware version of Windows 10 but for some reason, the USB drive (an old SSD from an rMBP in an OWC USB-3 enclosure) would not be recognized by the virtual Windows. I finally ended up using an actual PC running Windows 10 and it recognized the drive without problem.

    I also had the problem of having an install.esd file instead of an install.wim file.
    I tried the program suggested in the intowindows link but I guess it's no longer freeware.
    The comments in that same intowindows article mention a different program, ESD2WIM-WIM2ESD, and that one was free and worked.
    Just be sure to check your drive letters when following the above guide because the process of converting the install.esd to install.wim will add and remove some virtual drives on its own.

    I finished creating the drive on the Windows PC and then moved it to my 2014 rMBP and it option-booted just fine.

    Once I had Windows 8 running off of the USB drive I rebooted to OS X and ran Bootcamp Assistant to get the Bootcamp drivers.
    Returned to Windows 8 to install the drivers and then did an in-place upgrade to Windows 10 using the save nothing option. That was the longest part of the whole process -- probably took almost 2-hours.
    Windows 10 finally booted and I again installed the Bootcamp drivers.
    Whole thing probably took around 3-hours.
     
  2. versacedu macrumors newbie

    versacedu

    Joined:
    Jan 10, 2016
    #2
    Hello,
    I am having an iMac, and it is currently running Mac OS X, and I just bought an external ssd, and I would like to install windows 10 on it, and then use it to boot into Windows on my iMac when need to. However, I don't have have any clues how to do that. I have also bought an enclosure for the ssd.

    I also purchased a copy of genuine windows 10 Home version from Microsoft (usb version)

    Can someone please send me steps how to do that? Thanks so much in advance.
     
  3. Fancuku macrumors 6502a

    Fancuku

    Joined:
    Oct 8, 2015
    Location:
    PA, USA
    #3
    Unless things have changed with W10, Windows never allowed you to install on an external USB drive. You needed to use an external thunderbolt drive because Windows sees Thunderbolt as a PCI-E device which allows for installation.
     
  4. Gjwilly thread starter macrumors 68030

    Joined:
    May 1, 2011
    Location:
    SF Bay Area
    #4
    The steps are in the first post. The guide I quoted has all of the info that I needed to install Windows 8 on my external USB drive. I then upgraded to Windows 10.
    You need a 64-bit version of Windows 8 or higher with a valid activation key, a USB-3 enclosure that will be recognized in both the OS X and the virtual Windows environment (that was my problem -- my drive wasn't recognized in my virtual Windows machine -- I had to use an actual Windows machine), and you need a Mac that fully supports UEFI booting.
    --- Post Merged, Jan 13, 2016 ---
    The guide I followed worked with USB-3 and Windows 8.
     
  5. user97908 macrumors newbie

    user97908

    Joined:
    May 1, 2016
    Location:
    Washington
    #5
    someone have the info to do it from a mac ? i don't have any windows oriented computer, only el capitan and debian linux. i would like to do the same things but from mac (or linux). someone should put some efi folder on deposit it would be helpfull. this guy on ebay sell his applied method.
     
  6. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #6
    Hahaha, the seller's notes make no sense:

    "This listing is sold with a FAULTY RAM with eBay's Listing guidelines." Soooo... this is faulty RAM?

    "Items contained on the product are under the terms of the GNU License, the GNU Lesser General Public Licenses (LPGL) or the Mozilla Public License."
    Really? Microsoft uses Mozilla Public License for Windows?

    "Fully complies with Microsoft policy for Creating a backup system image of Windows."
    I doubt Microsoft's backup policy permits you to sell your Windows system backups for profit.
     
  7. Gjwilly thread starter macrumors 68030

    Joined:
    May 1, 2011
    Location:
    SF Bay Area
    #7
    He's reselling Microsoft licenses and the terms for OEM licenses require that they only be sold along with actual hardware. The faulty ram is the hardware. Its faulty but he's doing that so that he can claim that hes honoring Microsoft's and ebay's terms
     
  8. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
  9. Fancuku macrumors 6502a

    Fancuku

    Joined:
    Oct 8, 2015
    Location:
    PA, USA
    #9
    I've bought Dell OEM Windows 7 installation disks on ebay before and the seller included a stick of old ddr2 ram. They have to comply with the ebay rules and that's how they get around it. Nothing wrong with it in my opinion.
     
  10. Gjwilly thread starter macrumors 68030

    Joined:
    May 1, 2011
    Location:
    SF Bay Area
    #10
    Its a rule that keeps the honest honest but does nothing to curb the dishonest.
    A genuine reseller is one thing. A guy who just scavenges license stickers from discarded computers is another.
     

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