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RohithP Level 1 (0 points)

I'm attempting to bootcamp windows 8 64-bit onto my late 2011 macbook pro. I used the bootcamp assistant and allocated 50 GB to the windows partition. I formatted the partition to be NTFS. However, when I am trying to install windows 8 and I click on the bootcamp partition, I received two errors as follows:

"Windows cannot be installed to this disk. This computer's hardware may not support booting to this disk. Ensure that the disk's controller is enabled in the computer's BIOS menu."

"Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed GPT disks.

Side note: I am using a bootable flash drive instead of a disk because the windows 8 ISO was downloaded directly from microsoft's website.

MacBook Pro, OS X Mountain Lion (10.8.2)
  • Christopher Murphy Level 3 (555 points)

    When you booted from the USB media, it booted in (native) EFI mode, instead of using the CSM-BIOS Apple provides for Windows support via Boot Camp. Did you create the USB bootable media using Boot Camp Assistant or using some other method?


    Windows booted CSM-BIOS mode only installs to MBR partitioned disks.


    Windows booted EFI mode only installs to GPT partitioned disks. It's complaining about the presence of an MBR, which was created by Boot Camp Assistant.


    I can't tell you whether you're better off installing Windows 8 in EFI or CSM-BIOS mode. Ideally, EFI, because that will get you the best performance and reliability since you won't have to depend on flakey hybrid MBRs. But, it's possible Apple's collection of Boot Camp drivers for Windows, won't all work when Windows is booted in EFI mode vs CSM-BIOS mode. Most often video drivers are affected by this. So you're sorta in uncharted territory, but you knew that already by trying to install Windows 8 for which there's still no official support for yet.

  • RohithP Level 1 (0 points)

    I created the USB bootable media using Boot Camp Assistant, I had to add the ability by modifying the script to do that since the option wasn't intitially there.


    What would you suggest I do from here, my friend has a Retina Macbook Pro and Windows 8 works flawlessly on their's so I know it is possible.

  • J0ze91 Level 1 (0 points)

    From where did you download the W8 ISO? I haven't found it and I want to install it on my MB


    Thank you.

  • Christopher Murphy Level 3 (555 points)

    Try it with the latest Boot Camp Assistant, released with the OS X 10.8.3 update, which explicitly supports Windows 8. I can't tell you why two different Macbook Pro models exhibit different behavior when installing Windows 8, but Apple uses different firmware between models so that's a plausible explanation. And also, your USB stick clearly seems to have booted Windows 8 in EFI mode, not with the CSM and I doubt this is by design.


    I'm very curious if the Windows 8 support in the latest Boot Camp Assistant is installing Windows 8 in EFI or BIOS mode; and also curious how they're supporting 3TB drives when it's not strictly possible to do that with BIOS and MBR partition schemes.

  • Csound1 Level 8 (46,880 points)

    From here.


    Purchase Windows 8

  • J0ze91 Level 1 (0 points)

    I'll purchase it, but I need the ISO file to install it. I can't insert CD's in the MBP RD...

  • Csound1 Level 8 (46,880 points)

    It is available as a downloadable ISO at that site.


    Sorry, all of these seem to be upgrade versions.

  • the sai krishna Level 1 (0 points)

    @RohithP even i am getting same errors I hope you found out solution by now ! plz... can u share it ! i need it urgently
    Thanks in advance

  • JaredF Level 1 (0 points)

    I too am having massive issues with this. I have a MBP 8,3 with two hard drives. I'm tempted to actually put my optical drive back in & see if that helps.


    My USB version is also EFI and is giving the same error. I've even purchased win 8. This s rediculous just to have quicken home & business.

  • The hatter Level 9 (60,930 points)

    A VM like VirtualBox would make it a piece of cake and avoid dual booting (you could buy Parallels and have both the VM and dual boot if/when you needed to). For light office apps and even running IE8+ you're  better off without Boot Camp.

  • cronnos Level 1 (0 points)

    I'm having exactly the same problem on a 27" iMac late 2012 with 1TB fusion. I created the ISO from the original Windows 8 disk, had Bootcamp make the partition and the bootable USB and then, during the drive selection for the install I get the MBR partition table message. What can we do?


    (And please don't just say to do VM because some of us need to actually dual boot).

  • iSteber Level 1 (0 points)

    Have you tried to remove the EFI (backitup first) folder on the USB, it would then be forced to boot in bios mode.

  • JaredF Level 1 (0 points)

    As it turns out if you have removed your optical drive and installed a second drive you must re-install your optical and install from there. I think you might be able to remove the EFI and use the stick however you will still need to disconnect the second hard drive as this is what was giving the installer errors on my end.

  • Alfishe Level 1 (0 points)

    Bingo! removing all extra drives besides what I need to install Windows to is a solution.

    It's not bootcamp issue though. Windows 7 and 8 installers are very buggy and have same behavior on PC hardware.

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