Select the external drive from the left-side panel.Connect your external drive to your Mac.

If you want to partition an external drive, the steps are almost the same, but first, you need to format the external drive.

It may take several minutes for Disk Utility to check the drive and apply the changes.Give a name and specify a file system format for it.Click the Plus (+) icon under the diagram and select Add Partition.Your Mac’s hard drive is named Macintosh HD here. In the sidebar, select the drive you want to partition.You can find it in the Launchpad Applications folder or use the Spotlight search. Steps to partition a hard drive on a Mac: In recent updates, its options have been slightly reduced, but you can still partition your disk with this utility. MacOS has a default built-in application for working with disks and drives, called Disk Utility. When you partition a drive for installing two different operating systems, both systems think they have their own hard drive and work correctly. Without partitions, integrity would be impossible, and one system would damage another. This allows you to have easy and convenient access to your data on your Mac from each operating system. If you have to reinstall your system, your files will remain on another part of your drive.Īlso, anyone who wants to install multiple operating systems on a Mac first needs to split the disk into several partitions. In this case, your system and personal files will be stored separately. For example, you can partition an external hard drive and use one part for your Mac’s backup and another part for storing your documents and photos. Partitioning a hard disk means dividing it into separate and stand-alone parts.

Mac partition format types