Mac Mini 2010 Dual Boot: Mavericks + Windows 8.1

Discussion in 'Windows, Linux & Others on the Mac' started by DioBrando, Mar 23, 2014.

  1. DioBrando macrumors newbie

    May 17, 2013

    the title doesn't mention all the problems I had, because my hope is to solve them and give an example of what's needed if somebody else wants to try that too...

    First of all, I read like 20 different guides, mixed up but not got to a happy ending yet (my fault probably :)), I have the links if necessary.

    Before Mavericks I had a BootCamp dual boot configuration with Lion and Seven x64. That was fine but, because I replaced the hard drive with a SSD model, I took a chance to set as the newest environment as possible.
    I found out to my sadness that Mac Mini 2010 (model 4,1) is not supported by BootCamp 5 therefore Windows 8/8.1 neither.

    But there are workarounds to install BC5 and the other missing (mostly graphic) updated drivers.
    The problem is to get to that point.

    A second aspect is that, even if I have a DVD unit (by the way I own an external one too), don't ask me why, it doesn't read Windows DVD properly, so I decided to go for a pen drive installation, that is possible with another workaround.

    So, goals:
    1) Install native OSX Mavericks + Windows 8.1 x64
    2) Complete the Windows installation through a pen drive, not using DVDs

    What I did:
    1) Modify Info.plist file as it follows:
    1.add my Bootrom Version at the top in the "DARequiredROMVersions" section
    2.Delete "pre" from "PreUSBBootSupportedModels" that becomes "USBBootSupportedModels" and add my Model Identifier at Top First.
    3.Delete my model "Mac mini 4,1" from the Win70onlymodel

    Editing has been done with TextEdit plus XCode4 and thanks to this post.

    Cool, now BootCamp assistant in Mavericks has more features enabled, like the possibility of setting a flash drive up to install Windows or prepare a boot device with Windows 8, not only 7.

    Because I read that there are some problems to make the hardware being immediately recognized, I decided to postpone that part and not including Bootcamp drivers in the device.
    The pen drive was set up on a MacBook Retina 2013.
    After creating a partition (through the assistant), here come the problems.
    Windows 8.1 installation starts, I'm asked to choose a destination partition but whatever I do, a message appears and says:
    "windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks"

    I tried to
    - re-format the disk (I don't see any advanced options by the way, like this)
    - install rEFIt
    - use Windows 7 Tools, but it keeps telling that "unit is in use" and I can't reverse the .iso on the pen drive
    - change the partition table of the pen drive, from MBR to GPT but then I cannot copy the contents of .iso inside then


    I don't wanna make an upgrade from Seven and as far as I know Win8 use EFI just like OSX does, so what d'u suggest me to do? Are there any other ways I haven't explored yet or the solution is to re-format the disk again with the GPT file structure, install OSX and then Win8.1

    I can provide some images or details in addition.
    Thx a lot for ur help guys.
  2. DioBrando thread starter macrumors newbie

    May 17, 2013
  3. xcodeSyn macrumors 6502a

    Nov 25, 2012
    The reason you got this message is that your 2010 Mac Mini can only see the EFI Boot mode of the USB flash installer, but using Boot Camp Assistant requires the traditional BIOS mode of the Windows installer. This tells you that no matter how you hack the info.plist, there are things you cannot change especially for older Macs not able to properly read the USB Windows installer. You can confirm this fact by pressing the "option" key while starting up. For your 2010 Mac, you could only see the EFI Boot icon from the USB installer, but you'll see both Windows and EFI Boot icons on your newer 2013 MBP. It is the Windows icon that is required for Boot Camp installation, and your 2010 Mac can only identify it from a DVD installer.

    If you still want to install Windows using Boot Camp Assistant, then switch to a DVD installer is your only choice. Otherwise, do a Google search on how to install using EFI Boot mode and forget about using Boot Camp approach. Good luck.
  4. s3kahell macrumors newbie

    Jul 16, 2014
    Try this

    I'm not sure whether this post is still alive or not but I still want to help. I too had the same problem and followed various ways to install Windows 8.1 on my Mac Mini 2010 model and the only way it works out for this version is by first installing Windows 7 64 bit using the Bootcamp procedure and then once it's completed, open up your Windows 7, and install Windows 8.1 64 bit directly from within the Windows 7.

    Hope this helps:)
  5. Charadis macrumors 6502a

    Jul 3, 2010
    I did this same exact procedure. I had an old Windows 7 Pro disc handy and installed 7 through bootcamp. I didn't input the key though; I booted straight to Win 7 and went straight to installing Windows 8 Pro on a backup disc I had created on another computer. Everything went smoothly, and I later activated it prior to updating to Win 8.1 Pro.

    I will note, however, I keep getting a message that there are compatibility issues with BootCamp 4, but so far, I can still open the bootcamp console. Sent from my Mac mini.
  6. Padmini macrumors 6502a

    Aug 9, 2014
    Personally I would love to know why I am running in to the EFI Boot options as the only option when trying to Boot Camp under Yosemite with Win 8.1 on a 2012 Mac mini.

    I did this once before under Mavericks and had no issues.

    Under Yosemite, I run into EFI Boot as the only option, and thus can't install to the Boot Camp partition.

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