Pros
Can UEFI work with MBR?
Conclusion. Can I use MBR with UEFI? The answer is no – an MBR boot disk must work with the Legacy boot mode and to work with UEFI, the disk should be in the GPT partition style.
Can we use MBR with UEFI?
If you want to boot into UEFI BIOS using your current MBR-partitioned HDD, you’d need to reformat it to GPT. Otherwise, you’re stuck with booting only into Legacy BIOS.
Is MBR compatible with BIOS?
However, in principle it is possible to configure a system with BIOS firmware to boot using a GPT disk, and vice versa. MBR disks are primarily BIOS booted, as a result BIOS firmware and MBR disks are linked and much like BIOS, MBR also has several limitations.