BestExternal Hard Drives for MaciMore20202 Terabyte External Hard Drive Mac2tb Hard Drive Mac2.5 2 Tb Hard Drive2 Tb Hard Drive Mac Os 12 Terabyte Hard Drive MacExternal Hard Drive 2 TbJul 02, 2020 Choose Mac OS Extended (Journaled) for any disk that you plan to use as a Time Machine backup disk or as a bootable installer. Will you be using the disk with another Mac? If the other Mac isn't using..