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Overview

When traditional Recovery Mode on a Mac is not sufficient to reinstall the operating system, Apple Configurator 2 can be used to restore the computer at the firmware level.

This is applicable to Apple Silicon and Intel Macs with a T2 chip.
Not sure? Check here: Mac models with the Apple T2 Security Chip

(warning) Be sure that Configurator 2 is up to date!

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Table of Contents



Getting Stuck, When to Use

Typically, we boot into recovery mode, erase the hard drive, and reinstall macOS. Per

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serverId83ba53a2-437e-352b-b213-380a9e0e4533
keyPREP2020F-2445
, some of the computers did not allow the drive to be erased:

This message indicates that the Mac is activation locked, and that we should be able to enter the activation lock bypass code from Jamf. This did not work, and a support call to Apple confirmed that these devices were not, in fact, activation locked.

Due to the lack of a usable admin account or boot drive, the only real option left was to restore the computer via the method below.

Restoring

Revive + Restore with Configurator

This is a summary. Official documentation is here, depending on your device:

  1. Make sure you have the latest version of Configurator
  2. Connect a USB-C cable to the left-front port of the non-working Intel Mac
    1. Left-rear for Apple Silicon
  3. With the laptop off, press Power + left Control + left Option + right Shift for 10 seconds
  4. Keep holding the power button but release the others until the laptop appears in Configurator as "DFU"
  5. Right-click and chose Advanced > Revive
  6. When the revive step is finished, right-click and chose Restore, which will prompt something like
      You
      1. For both 5 and 6, you may have to install a software update to be able to connect to the laptop
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    1. Note that the non-working laptop screen will be blank this whole time. When the process is complete, and the non-working laptop no longer says "DFU" in Configurator, you can disconnect and power on.
    2. There will be absolutely nothing on the drive, the only choice will be Internet Recovery
      NEED TO VERIFY STEP 8, DOES IT ACTUALLY INSTALL THE OS?
    3. In Recovery Mode, go to Disk Utility and erase the disk so it's ready, then install the OS