Select the disk, right-click, choose Get Info, and you’ll see the GUID in the Disk / Partition UUID section. On a Mac, use Disk Utility to find a disk’s GUID. If the error doesn’t show up on the new drive, then the first one might be damaged and need replacing. Try a different drive: If you keep getting this error, your drive might be failing.This can help fix partition table problems. Switch up the scheme: If you were trying to format with a specific scheme (like GUID) and it didn’t work, try a different one (like Master Boot Record) and then switch back.Be sure to pick the right format and partition scheme. Try formatting the drive again: Sometimes, giving it another go works, especially if the issue was just a temporary glitch.If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to eraseit’s at the top of the hierarchy. Click the Scheme pop-up menu, then choose GUID Partition Map. It could be because the drive is corrupted, physically damaged, or not connected properly. In the sidebar, select the storage device you want to erase, then click the Erase button. This error usually means something’s wrong with the drive. Your drive is now formatted with the GUID partition map scheme. Under Schemes, select GUID Partition Map.
Click on Erase, give the drive a name then change the format to exFAT or APFS.(Disk Utility is located in the /Applications/Utilities folder.) Alternatively, click Launchpad in the Dock, type Disk Utility in the search field, then click. In the Finder, choose Go > Utilities, then double-click the Disk Utility icon. Click on View in the top-left corner and select Show all devices from the drop-down menu. After setting the external SSD as the startup disk and migrating your data, you can erase the internal disk.Connect your external drive to your Mac then open Disk Utility.
Here is a step-by-step guide on how to format your Mac hard drive with GUID on macOS Ventura: If your Mac uses a Solid State Drive (SSD), or if you’re running macOS High Sierra or later, APFS is usually the preferred option.