Archive for June 24th, 2015

by Tom Nelson

Partition types, or as Apple refers to them, partition schemes, define how the partition map is organized on a hard drive. Apple directly supports three different partition schemes: GUID (Globally Unique IDentifier) Partition Table, Apple Partition Map, and Master Boot Record. With three different partition maps available, which one should you use when you format or partition a hard drive?


Screen shot © Coyote Moon, Inc.

Understanding Partition Schemes

GUID Partition Table: Used for startup and non-startup disks with any Mac computer that has an Intel processor.

Requires OS X 10.4 or later.

Intel-based Macs can only boot from drives that use the GUID Partition Table.

PowerPC-based Macs that are running OS X 10.4 or later can mount and use a drive formatted with the GUID Partition Table, but cannot boot from the device.

Read more on About: Macs.



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