Q: How to convert MBR to GPT to work around Windows bootcamp install error

Hi,

I have a problem as a previous post (Windows 8.1 install on iMac with fusion drive, GPT partition error):

"Hello,

I have been trying to install windows via bootcamp on my iMac and cannot seem to fix the 'Windows cannot be installed to this disc. The selected disc is of the GPT partition style' error.

I am successfully completing all steps until I am in the Windows install and select the partition on which Windows should be installed. I get the error 'Windows cannot be installed to this disc. The selected disc is of the GPT partition style.' I have formatted the partition, but I still get the same error."

Am trying to get this resolved ASAP. I have a MacBook Pro 8,2 (early 2011). El Capitan installed. I have already disabled SIP. Trying to install Windows 10, if possible, or 8.1 if not and then upgrade to 10. The target volume is disk0s4. I have been successfully able to create a Windows 10 USB install disk (even on my 2011 MBP), thanks to https://mihail.stoynov.com/2013/04/22/force-boot-camp-into-using-an-iso-image-of -windows-to-create-the-usb-flash-drive-for-mountain-lion-with-updated-boot-camp/

I've tried looking all over this forum and elsewhere to resolve my issue. I have come across user "Loner T"'s assistance and am hoping he can chime in for my case. Below is the output of the following commands in Terminal:

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

Additionally, I've downloaded gDisk but I can't seem to be able to select any options. Will wait for instructions.

Many thanks in advance.

Best,

Gabriel

Last login: Mon Apr 25 14:24:12 on ttys000

dGabriels-MBP:~ gabrielaxel$ diskutil list

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *1.0 TB     disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:                  Apple_HFS Axel HD                 937.5 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

   4:       Microsoft Basic Data Windows                 61.7 GB    disk0s4

/dev/disk1 (external, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     FDisk_partition_scheme                        *15.6 GB    disk1

   1:                 DOS_FAT_32 WININSTALL              15.6 GB    disk1s1

Gabriels-MBP:~ gabrielaxel$ diskutil cs list

No CoreStorage logical volume groups found

Gabriels-MBP:~ gabrielaxel$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168

gpt show: /dev/disk0: Suspicious MBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 1953525167

       start        size  index  contents

           0           1         MBR

           1           1         Pri GPT header

           2          32         Pri GPT table

          34           6        

          40      409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

      409640  1831009760      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

  1831419400     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

  1832688936   120574048      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  1953262984      262151        

  1953525135          32         Sec GPT table

  1953525167           1         Sec GPT header

Gabriels-MBP:~ gabrielaxel$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 sectors]

Signature: 0xAA55

         Starting       Ending

#: id  cyl  hd sec -  cyl  hd sec [     start -       size]

------------------------------------------------------------------------

1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>

2: AF 1023 254  63 - 1023 254  63 [    409640 - 1831009760] HFS+       

3: AB 1023 254  63 - 1023 254  63 [1831419400 -    1269536] Darwin Boot

4: 07 1023 254  63 - 1023 254  63 [1832688936 -  120574048] HPFS/QNX/AUX

Gabriels-MBP:~ gabrielaxel$