College Library - Troubleshooting - Reimaging "locked" Loaner Mac Laptops

Instructions for troubleshooting the reimaging process on a circulating Mac laptop

  1. Plug a Mac Provisioner flash drive into the computer
  2. Hold Option (⌥) while powering the Mac on until the Apple logo disappears
    • If you see an option to boot to "Install macOS Big Sur", choose that and press enter (figure 1)
    • If no options appear, then press Command-R to boot into Recovery Mode
  3. If you come to a screen that asks for a user password (figure 2), click Recovery Assistant at the top of the screen and select "Erase Mac..."
  4. After selecting this, you will see a new screen to erase the Mac, click Next (figure 3)
  5. You will have to confirm this choice (figure 4).
  6. The computer will reboot and you can proceed as you normally would to reimage the Mac.

Note: Figure 5 shows a boot mode for external configuration of the Mac's internal drive. Rebooting will return you to normal operations.

Option BootOption Boot, Figure 1

Figure 2, Stuck in RecoveryRecovery Stuck, Figure 2

Figure 3, Start Erase Mac ProcessErase Mac, Figure 3

Figure 4, Confirm Erase MacErase Confirm, Figure 4

Figure 5, Target Disk ModeTarget Disk Mode, Figure 5


Keywords:Apple, Mac, computer labs, loaner, InfoLabs, MacBook, Air imaging provisioner, locked, login, language, stuck   Doc ID:114387
Owner:Reina W.Group:InfoLabs
Created:2021-10-20 08:49 CDTUpdated:2022-04-05 09:56 CDT
Sites:General Library System, InfoLabs
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