You can also set a “Quota Size” which is the maximum amount of storage this volume can allocate. Alternatively, you can use APFS (Encrypted), APFS (Case-sensitive), or APFS (Case-sensitive, Encrypted). If you’re using macOS 10.13 or later, then APFS is the recommended format.
In Disk Utility’s left-and menu, select an existing APFS volume, and then select the “Volume: Add” button.In the Disk Utility toolbar, select “View > Show All Devices.”.Open the “Finder” and navigate to “Applications > Utilities.”.The first step, is to create a new volume: With the release of High Sierra and Mojave, dual booting has just become a lot easier! These versions of macOS support Space Sharing, which is a feature of the Apple File System (APFS) where the available space is shared between different volumes, so you can install a second version of macOS with no reformatting required. Before making any system-level changes, you must always make a full Time Machine backup, just so you have something to restore in the unlikely event that everything goes horribly wrong.
