Error: selected disk MBR partition table, EFI system only GPT disk

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Level 1

10 points

Error: selected disk MBR partition table, EFI system only GPT disk

hi!

i wanted to re-create my windows 10 partition on my MBP (mid 2012, 13inch) because i needed more storage. so i followed the boot camp assistent (deleting the old partition and creating the new one). after my mac restarted i got a black screen with a flashing line. after some time still nothing happend so i shut it down and used "efi boot" to boot. now i was able to do the first steps of installing windows. but after i formatted the prepared partition i got this error:

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

i retried the whole process several times but it's always the same.

some further information to my MBP: using a usb flash drive with usb 2.0 for the installation; i have a ssd (250gb) and a hdd (500gb) in my MBP, i'm trying to install windows on the ssd which is also my start volume for macOS (sierra, 10.12.6)

in this post https://discussions.apple.com/thread/6864047?answerId=27784533022#27784533022 somebody has the same problem and the reason is described but i don't know how to solve the problem.

MacBook Pro (13-inch Mid 2012), macOS Sierra (10.12.6)

Posted on Oct 14, 2017 12:25 AM

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Answer 1

Best reply

Loner T

Level 9

59,471 points

Oct 24, 2017 2:51 PM in response to rapba

Your Mac does not support EFI Boot. You need to use the Windows icon on the USB installer.

Also, two disks are not supported in a 2012 MBP, you will need to temporarily disconnect the disk in Optibay. Windows disk must be in the main bay and stay in the main disk bay after Windows is installed. Windows will not work properly in the optical bay drive.

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Answer 2

SheikiD

Level 1

12 points

Oct 24, 2017 8:33 PM in response to Loner T

Hi . I'm having the same issue with my iMac late 2011 . I've been trying to install windows 8 for days now and i'm stuck at the same place as him .exepct when I boot my Mac I can only see de EUFI Boot . Not the windows one

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Answer 3

SheikiD

Level 1

12 points

Oct 26, 2017 7:57 PM in response to Loner T

Alright . No my audio does not work when i'm operating windows ( the iMac speaker) but it works with a Headset plugged in :) thanks for the insight I was wondering why my sound wasnt working ! Should I know something else about this ? Thanks alot by the way

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Answer 4

Loner T

Level 9

59,471 points

Oct 26, 2017 8:03 PM in response to SheikiD

The correct installation on a 2011 Mac is to use the built-in Optical drive on the Mac, which will allow the Audio hardware to be correctly exposed for the built-in speakers to work.

This method installs Windows using legacy BIOS mode. Your 2011 Mac is a pre-UEFI Mac.

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Answer 5

Bozzhog

Level 1

4 points

Oct 27, 2017 10:15 AM in response to rapba

I partitioned both the bootcamp and the macHD AS GPT I didn't use there make a partition bootcamp.i formate bc as msDOS AND MAC HD left as journaled.then I downloaded the iso file from Microsoft and dropped it in bc.then restarted and I used no key and used pro not home it works .

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