Master Boot Record: for Windows partitions that will be formatted as MS-DOS (FAT) or ExFAT.

GUID Partition Map: for all Intel-based Mac computers.

There are 10 formats (file systems) you can select in macOS 10.13 or above: Step 4: Edit the disk name, and select a format and a scheme. If you find there's something wrong to read your external hard drive, then you can turn to an external hard drive that doesn't show up in Disk Utility for help. Step 3: Choose your target external hard drive or volume, and click Erase on the top. Step 2: Launchpad → Other → Disk Utility, and click the Disk Utility. Click here when the external hard drive doesn't mount on Mac. Step 1: Connect the external hard drive with your Mac, and the computer will mount your external hard drive.

Part 1: Two methods to format external hard drive on Mac Method I: Format an external hard drive through 'Disk Utility' (newbie friendly) Part 2: Understand external hard drive, container, volume, and partition on Mac Part 1: Two methods to format external hard drive on Mac Then how to format an external hard drive on Mac? Here are two methods for those people who urgently need to erase an external hard drive. When there are bad sectors that don't store the data of bootstrap procedure, but of some important private files, people expect to format and back up to make these files accessible again when people's hard disks can no longer write in further, they expect for erasing disk to pave way for new items to write when there are file system errors in people's hard disks resulting from frequent hot swapping, they expect for formatting to give rebirth to these dying disks and make them in use again. Of course, there are different occasions when people want to get their external hard drives erased. 'Format', a word which is connected with 'all data clear' and which is different from what it is called so on Windows, has another name on Mac, 'erase'.

Reformat external hard drive mac