
on MacBook Pro/Air, iMac using Disk Utility. If you've all set, follow steps below to format internal startup disk and Mac external hard drive, HDD, etc. The built-in disk manager tool on Mac Disk Utility can be used to format Mac hard drive without any other third party tools. How to Format a Hard Drive on macOS (macOS Sierra or Earlier) If you've made a backup, let's start formatting Mac hard drive. It helps mount iPad iPhone as a flash drive and backup your Mac data including music, videos, movies, TV shows, photos, apps, documents and more in a simple click. I recommend using MacX MediaTrans, a lesser-known but efficient Mac file transfer and backup tool. Tips: you have lots of Mac backup software to choose from, among which Time Machine, iCloud, and MacX MediaTrans are the best bets. Thus, data backup is a must in case of data loss. It's worth mentioning that formatting a hard drive on Mac will delete all current data stored on that drive. Many users followed instructions to format Mac hard drive but ended up deleting some important data that they couldn't get back any more. Things to do before formatting Mac hard drive


you plan to backup DVDs to Mac hard drive or store other files and need to format an external hard drive for macOS to extend storage space.
