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Erasing a FileVault-encrypted T2-equipped Mac

April 7, 2020 1 comment

Normally, reinstalling macOS on a Mac is a straightforward process:

1. Boot to macOS Recovery
2. Select Reinstall macOS from macOS Utilities.

Screen Shot 2020 04 06 at 2 09 13 PM

3. Follow the onscreen instructions.

However, if you have a Mac equipped with a T2 chip where FileVault is turned on, there’s an extra step involved. When you boot to macOS Recovery on a T2 Mac with FileVault on, you will be prompted for the password of an account on the Mac which has admin privileges.

Screen Shot 2020 04 06 at 4 47 19 PM

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If you don’t have the password to any of the accounts which appear, you can select the Forget all passwords? option.

Screen Shot 2020 04 06 at 4 47 20 PM

This will bring up a new screen where you can enter a FileVault Personal Recovery Key.

Screen Shot 2020 04 06 at 4 47 40 PM

If you can provide either the account password or the personal recovery key, the next thing you should see is the macOS Utilities screen.

Screen Shot 2020 04 06 at 2 09 13 PM

 

What if you don’t have either a password or a personal recovery key? Is your Mac now a paperweight? For more details, please see below the jump.

Read more…

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