It completely erases the contents of your Mac's drive. There's nothing complex about what formatting HDD is used for.
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Part 2: When You Need to Format Disk on Mac Your Mac suddenly turning off while your drive is being repaired or formatted will only bring forth new errors. If you're not near a power source, make sure your battery is fully charged before you start the formatting of the process.Backing them up might be a tedious task, particularly if your hard drive is the motherload of data, but would you rather forgo it and jeopardize the security of your files? Because you're not a machine and it's probable for you to forget you still have important files in the drive to be formatted.
The importance of backing up your files BEFORE formatting cannot be emphasized enough.Even if the hard drive is corrupted and can't be formatted, you can use Disk Utility to fix and then format it if the error isn't too grave, formatting alone should suffice.
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How to Format New Hard Diskįormatting a new disk, in the simplest of terms, means setting up a file system in the new drive to work with your macOS. No one needs to tell you formatting your Mac's drive entails reinstalling the macOS afterward, right? As long as you're aware of that, you're good to go. Apple has given you several options to choose from should you ever need to format or reformat your drive. The simple reason you might want to completely wipe your Mac's internal drive is that it has encountered one serious error or another.