Partition schemes available in Disk Utility on Mac
When you erase and format a storage device in Disk Utility on Mac, you’re asked to choose a scheme to use. Disk Utility supports the following schemes:
GUID Partition Map: Choose this option for all Intel-based and Apple silicon Mac computers. Some newer Microsoft Windows-based computers can also use this scheme.
Master Boot Record: Choose this option for compatibility with all Microsoft Windows-based computers.
Apple Partition Map: Choose this option for compatibility with old PowerPC-based Mac computers.