reformat mac hard drive external for fresh install

Reformat Hard Drive External For Fresh Free To Skip

This might happen for a variety of reasons, all of which keep you from erasing or reformatting the drives connected to your Mac.

Reformat Hard Drive External For Fresh Free To Skip

Feel free to skip this section if you already know how to do it.

Or you might need to reformat it so it works with different operating systems, like Windows, Linux, or even iPadOS.

So make sure to back up any important files before erasing or reformatting your drives.

Use the steps below to fix it and let us know in the comments which one worked for you.

A Volume is the partition or section of a drive you store data in.

You should see the device names for each of your drives appear in the sidebar.

Take note that when you erase a device, it erases all the Volumes contained within it as well.

When you run First Aid, it scans the entire disk for errors and lets you know if there are any it cant repair.

At the top of the window, click the First Aid button, then agree to Run First Aid.

The length of time First Aid takes to run depends on the size of your drive, how much data is on it, and how many errors need fixing.

The startup disk is the main hard drive on your computer: the one that stores macOS and all your data.

Its not usually possible to erase the startup disk because your Mac is using it to run macOS.

Keep holding both keys until you see an Apple logo or hear a startup sound.

Select Disk Utility from this window and try erasing or reformatting your drive again.

This is because the original macOS installation was on the startup disk you just erased.

Boot into Recovery Mode once more to reinstall macOS or follow our guide to factory reset any Mac.

When you reinstall macOS, your Mac behaves as though its a brand new machine, with no data on it waiting for you to set it up.

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Reformat Mac Hard Drive External For Fresh Install