2012 Macbook Pro having problem installing windows without using EFI boot.

Hi Loner T, thanks for the fast reply. Ive already installed GPT FDisk before and got the following ouput:

GPT fdisk (gdisk) version 1.0.4

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

  MBR: protective

  BSD: not present

  APM: not present

  GPT: present

Found valid GPT with protective MBR; using GPT.

I saw some posts where you requested diskutil list, so here's that too:

/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_APFS Container disk1         490.1 GB   disk0s2

   3:       Microsoft Basic Data                         509.8 GB   disk0s3

/dev/disk1 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +490.1 GB   disk1

                                 Physical Store disk0s2

   1:                APFS Volume Macbook 1TB             17.4 GB    disk1s1

   2:                APFS Volume Preboot                 23.7 MB    disk1s2

   3:                APFS Volume Recovery                509.8 MB   disk1s3

   4:                APFS Volume VM                      2.1 GB     disk1s4

/dev/disk2 (disk image):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     Apple_partition_scheme                        +215.1 MB   disk2

   1:        Apple_partition_map                         32.3 KB    disk2s1

   2:                  Apple_HFS Google Chrome           215.1 MB   disk2s2

Command (? for help): P

Disk /dev/rdisk0: 1953525168 sectors, 931.5 GiB

Sector size (logical): 512 bytes

Disk identifier (GUID): 67DEC1B9-526D-4B06-9DC0-016743242EB1

Partition table holds up to 128 entries

Main partition table begins at sector 2 and ends at sector 33

First usable sector is 34, last usable sector is 1953525134

Partitions will be aligned on 8-sector boundaries

Total free space is 265341 sectors (129.6 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name

   1              40          409639   200.0 MiB   EF00  EFI System Partition

   2          409640       957540631   456.4 GiB   AF0A  

   3       957542400      1953261567   474.8 GiB   0700  

Command (? for help): R

Recovery/transformation command (? for help): O

Disk size is 1953525168 sectors (931.5 GiB)

MBR disk identifier: 0x00000000

MBR partitions:

Number  Boot  Start Sector   End Sector   Status      Code

   1                     1   1953525167   primary     0xEE

Recovery/transformation command (? for help): H

WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one,

just hit the Enter key at the below prompt and your MBR partition table will

be untouched.

Type from one to three GPT partition numbers, separated by spaces, to be

added to the hybrid MBR, in sequence:  2 3 

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

Creating entry for GPT partition #2 (MBR partition #2)

Enter an MBR hex code (default AF): 

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default 07): 

Set the bootable flag? (Y/N): Y

Unused partition space(s) found. Use one to protect more partitions? (Y/N):  (What should I answer?)

Success! Thank you for all your help. Really appreciate it. Is there anything else I should know? Like is it possible to do the installation via Usb 2.0 or is the DVD method just easier? And can I install all the latest updates from Microsoft (including version 1903 that released in May)? Best way to handle widescreen monitors since it doesn't look like they have support? (I'll probably create a new thread for this.) Any other tips/tricks are welcome. If i'm not mistaken (from rummaging through other threads) we might have the same Macbook Pro? Either way I can't thank you enough.

"Did you install BC drivers?"

Yes, and it seems to be updated too, but I thinks its a gpu thing. It seems to help if you are able to change the refresh rate of the screen though. Mac side also had the same problem and I managed to make use of an app called SwitchResX which lets me use the 2560 x 1080 resolution of the monitor and it automatically changed the refresh rate to 45 hz. Although the app is on a 10 day trial so im still looking for a solution. Windows side only has two options for changing the refresh rate which is 59 and 60 hz so I haven't had much success there. Tbh it's probably time for an upgrade but I'm still enjoy him while I can. He's brought me quite a long way.

Are you familiar with some of the problems that are presented with the Windows 10 May update? There happens to be some features that I was making use of from this update (like the brightness slider for late nights) and im thinking of maybe giving it another go. I don't know if it's possible to roll back from this update instead of reinstalling though (obviously I would want to avoid that). And this is probably a stupid question but do I need to use GPT FDisk again after formatting the partition or just when im re-partitioning?

Done and dusted. Completed the rest and Rebooted. Do I need to check anything before trying the Windows 10 installation again?

No idea. How to check? I just know it's the Intel(R) HD Graphics 4000.