Select your internal disk and choose Format in the toolbar.Edit: Probably worth noting that in this case machine A was running 10.14 (and HFS) and machine B 10.15 (and APFS) - but I'd imagine 10.15 should be able to open a 10.14 HFS sparse bundle without an issue.System Utilities downloads - Ext2Fsd by Matt Wu and many more programs are available for instant and free download. Starting with High Sierra, your Mac will automatically create a snapshot before installing any macOS updates (assuming that you’re installing the update on a boot drive that uses APFS). Similar to Windows restore points, an APFS snapshot is a read-only copy of the state of your Mac at the time when that snapshot was taken.When the conversion starts, you'll see a progress indicator with all the geeky details if you elect to show them.
