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. Running an Intel machine ...

On Intel-based systems you should use the GUID partitioning scheme, and on older PowerPC systems you should use the APM scheme. For drives you plan on booting in Windows, you will need to use ...

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 ...

Click OK to dismiss the sheet. Click Apply and the drive will be reformatted with the GUID partition scheme. Note: When you reformat that drive, you erase everything on it.

0: GUID_partition_scheme *1.0 TB disk1 1: EFI 209.7 MB disk1s1 2: Apple_CoreStorage 999.3 GB disk1s2 3: Apple_Boot Recovery HD 650.0 MB disk1s3 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER ...

(Ignore any partitions labeled GUID_partition_scheme or EFI.) Now you need to find out what size your new partition can be. Run this command: diskutil resizeVolume disk_identifier limits ...