If you want to use Disk Utility to format—and much more usually than not, re-format—a drive in macOS, you might in some cases want to to start with pick out the scheme for backwards or multi-platform compatibility. The plan defines the over-all firm of the drive, which can truly feel fairly obscure, because you almost never will need to modify it.
You can pick among GUID Partition Map, Grasp Boot Partition, and Apple Partition Map. For all contemporary Macs, GUID Partition Map is the only decision and it just about in no way needs to be changed Grasp Boot Partition is beneficial for cross-system drives that can be mounted in Windows and in macOS, as with working with the ExFAT structure sort. (Apple Partition Map dates back to PowerPC Macs.)
The format describes the way divisions in the disk are structured to study as data files and directories by an functioning procedure. For drives only mounted on Macs, APFS is the latest best alternative, but is only backwards appropriate a handful of variations of macOS for optimum compatibility, choose HFS+, which is labelled “Mac OS Extended (Journaled)” in Disk Utility.
Structure generally seems when you pick out an merchandise and click Erase, but Scheme never for you. Why is that? Due to the fact you are displaying only volumes, not drives nor are they containers (for APFS formatted drives and partitions).
From the Perspective menu in the higher-left corner, pick out Present All Products, and you will see the hierarchy of push > quantity (most formats) or generate > container > quantity (APFS). Now, you can pick out a generate, simply click Erase, and look at the Scheme possibilities for the generate as very well as the default structure type applied when the drive has finished making use of the new plan.
This Mac 911 posting is in response to a issue submitted by Macworld reader Joe.
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