MS-DOS (FAT) and ExFAT: File systems that are compatible with Windows.
Mac OS Extended: The file system used by macOS 10.12 or earlier. If you don't see this button, click Erase instead. Apple File System (APFS): The file system used by macOS 10.13 or later. Format: APFS or Mac OS Extended (Journaled), as recommended by Disk Utility.Click the Erase button in the toolbar, then enter the requested details:.Select Macintosh HD in the sidebar of Disk Utility.From the utilities window, select Disk Utility and click Continue.