Once you have connected the new drive to your computer, follow these steps below. Optionally for a traditional portable hard drive you can also select the format Mac OS Extended (Journaled). If you already know how to use Disk Utility, the format information to choose is APFS or APFS (encrypted) and the scheme should be set to GUID Partition Map. Follow these directions to get your drive formatted for the Mac. Let's dive into a bit more details about the top three choices below, and then explain a few of the sub-options.Occasionally you may purchase a drive that comes pre-formatted for use on Windows and will need to erase it to use properly on the Mac. The other factors, like encryption and case sensitivity, aren't something you should get too hung up on. Use this for an external drive that will plug into both kinds of computers.Ĭhoosing a file system is basically choosing between these three options. ExFAT is the best cross platform option, designed to work on Windows and macOS systems.On macOS High Sierra, it's used on all mechanical and hybrid drives, and older versions of macOS used it by default for all drives. Mac OS Extended, also known as HFS Plus or HFS+, is the file system used on all Macs from 1998 until now.
It's optimized for solid state drives (SSDs) and other all-flash storage devices, though it will also work on mechanical and hybrid drives. APFS, or "Apple File System," is one of the new features in macOS High Sierra.Related: What's New in macOS 10.13 High Sierra, Available Now
What does all this mean, and which should you choose? Basically there are three main options:
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