Deleting hard drive

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Deleting hard drive

Hi all,

I am in the process of trading in my Mac and I’m running into an issue deleting the hard drive. I already approached apple support and they told me I would need a third-party to delete the hard drive. I’d like to avoid that.

I’ve already run first aid on all the volumes, but to no avail. I’ve also tried going into the terminal but I get a message saying one of the volumes won’t unmount. I apologize for the rambling/whinging. I figured wiping the hard drive would be easy. How wrong I was...

iMac 21.5″, 10.15

Posted on May 6, 2021 5:37 PM

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Answer 1

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BDAqua

Level 10

250,253 points

May 6, 2021 6:19 PM in response to Senzapaura

Have you tried Disk Utility from Restore Mode, CMJD+r keys?

1. Start up from macOS Recovery

To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if you never installed macOS Sierra 10.12.4 or later… https://support.apple.com/en-us/HT204904#notupdated

Command (⌘)-R

Install the latest macOS that was installed on your Mac.

Option-⌘-R

Upgrade to the latest macOS compatible with your Mac.

Shift-Option-⌘-R

Install the macOS that came with your Mac, or the closest version still available.

2. Decide whether to erase (format) your disk

If you need to erase your disk before installing macOS, select Disk Utility from the Utilities window, then click Continue. You probably don't need to erase, unless you're selling or giving away your Mac or have an issue that requires you to erase. Learn more about when and how to erase.

3. Install macOS

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Deleting hard drive

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