Tagging along with EFI is a new partition scheme: GUID Partition Table (GPT); GUID itself is an acronym, expanding to Globally Unique Identifier. GUIDs are locally generated, world-unique random ...

However, there's an asymmetry here. Although a PPC machine cannot boot up from a GUID-partitioned disk, an Intel machine can boot up from an Apple partition scheme disk.

In this window, click the menu below Volume Scheme, which by default will read "current," and choose 1 Partition. Then click the Options button below the drive representation and you will be ...

0: GUID_partition_scheme *121.3 GB disk0 1: EFI 209.7 MB disk0s1 2: Apple_CoreStorage 121.0 GB disk0s2 3: Apple_Boot Boot OS X 134.2 MB disk0s3 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER ...

Select any partition that you plan to use as a startup disk for the Mac OS and click on the "Options" button to set its partition as GUID.

Although my Mac Pro could use this drive for external storage, when I attempted to install Leopard on it, I was told that, as it was connected to an Intel Mac, I must use the GUID partition scheme.

I want to partition the card so I can use it for an OS install disk (Mac OS Extended GUID) in one partition and as a camera disk (MS-DOS FAT) in the other partition.

In this output, there are two nodes—DeviceNodes: 0, of type FDisk_partition_scheme, and 1, of type DOS_FAT_32. Since we have used MBR fat32 as a parameter, so we will have MBR instead of GUID.