

Thus, if you install Windows on BIOS system and GPT partition table comes in your way. If you want to boot system from GPT disk, the motherboard should support UEFI while on BIOS you should use MBR partition table.

Due to different boot modes, there are two types of partitioning schemes: MBR (Master Boot Record) and GPT (GUID Partition Table). Most Windows versions have UEFI (Unified Extensible Firmware Interface) boot mode, while some versions since older days of Window XP have BIOS (Basic Input Output System) boot mode. There are two types of boot modes: BIOS Boot Mode and UEFI Boot Mode. Generally, the main cause is motherboard. You will ask why Windows cannot be installed to this GPT disk. You may receive the error message " The selected disk is of the GPT partition style" when installing Windows OS to a GPT-style disk, see picture below. The selected disk is of the GPT partition style.

On EFI systems, Windows can only be installed to GPT disks." So I set up hybrid partitions, using Gdisk, with 4 MBR partitions at the beginning of the disk (for some reason, the Windows XP installation will fail if the 4 MBR partitions are at the end of the disk, and for some other reason it needs to be on the 4th, but those are different issues).īut the EFI Boot Windows 10 installation doesn't see the GPT partitions, it only sees the MBR partitions and sees the GPT part of the disk as unallocated space:Īnd says: "Windows cannot be installed to this disk. I am trying to install Windows 10 in EFI mode on a Mac Pro 5.1, to co-exist with Snow Leopard, also installed in EFI mode, in GPT partitions, and Windows XP, installed in BIOS mode, in an MBR partition.
