I'm trying to install Windows 8 on my Mac (10.7.5) but I'm running into some big issues. First I'll explain what I already did.

  1. Created a partition with the Boot camp assistant (151 GB) creating a partition in Windows
  2. Installed an ISO on my external hard drive.
  3. Rebooted my Mac holding the ⌥option key so I could choose a start drive disk
  4. Selected EFI BOOT Boot selection with Startup Manager
  5. Entered my serial number and continued.

And here does the trouble begins:

  1. Now a see a list of drivers and my partition but I can't select my Drive 0 Partition 4: Bootcamp Selecting a partition to install Windows on

These are the errors I get:

"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.

Windows cannot be installed to this hard disk space. Windows must be installed to a partition formatted as NTFS.

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"

I already tried to run this command(s)

select disk 0                      (assuming 0 is the disk where you created the bootcamp partition)
select partition 4                 (assuming 4 is your bootcamp partition)
format fs=NTFS label="Windows 8"   (I didn’t use QUICK)

specs: https://gist.github.com/Nathansakoetoe/a733fea6abdc20d47764

Note: Drive 1 is my external hard disk.

  • Which Mac, which Bootcamp? Win 8 can only be installed with Bootcamp 5 & newer Macs.
    – Tetsujin
    Dec 27, 2014 at 21:05
  • Edited the first message with the specs. I already did installed windows 8 on this mac but the problem was that it only rebooted with my external hard disk connected to it. After that it did not booted again so I had to delete it all.
    – WhoThisKid
    Dec 27, 2014 at 21:08

1 Answer 1


Superuser has answer to this.

Basically Bootcamp assistant converted the disk from a legal GPT disk into a hybrid MBR disk, which OS X sees as GPT and Windows sees as MBR. The solution in this case is to clear the hybrid MBR data. Check the link to look how to do it.

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