How to fix "Hard Drive Doesn't Use The GUID Partition Scheme" Error When Installing macOS

Reinstalling macOS can be frustrating, especially if you are installing the macOS from an USB drive. Same happened with us when we were trying to install a fresh copy of macOS High Sierra on a Mac Mini 2010. We have had the hard drive replaced with one SSD and then used an USB Bootable macOS installer when we encountered the problem for the first time. So, don't panic, here is a simple fix to the "Hard Drive Doesn't Use The GUID Partition Scheme" error.

Once you are in the installer screen, click on Utilites and open the Terminal. We will use diskutil command to fix this error. All we have to do is erase the disk, doing so the system will automatically create the GUID Partition Scheme for the selected hard drive.

Once you are in the terminal, use the command

diskutil list

This will list all the available drives. Identify the disk you want to fix, in our case it was disk0. The output will look something similar to the following image:

To check the details about your target drive, use the following command. It will show you the existing Partition Scheme.

diskutil list disk0

Now, finally use the following command to erase the disk. While erasing the system will automatically create the GUID Partition Scheme for you.

diskutil eraseDisk {filesystem} {Name to use} /dev/{disk identifier}

For example,

diskutil eraseDisk JHFS+ DriveTitle /dev/disk0

Wait for the terminal to finish erasing the disk. Once done, type exit and hit the return key. Then close the terminal and proceed with your macOS installation. Everything should be fine now.

Cheers!