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How to allow Mac to boot from external media

APPLIES TO:
  • Parallels Mac Management

Information

In order to allow a Mac with T2 Chip to boot from PMM USBBoot you need to allow the Mac to boot from external media:

  • Turn on your Mac, then press and hold Command (⌘)-R immediately after you see the Apple logo to start up from macOS Recovery.
  • When you see the macOS Utilities window, choose Utilities > Startup Security Utility from the menu bar.
  • When you're asked to authenticate, click 'Enter macOS password', then choose a local administrator account and enter its password.

 

In Startup Security Utility:

1. Set Secure Boot option to 'No Security'.

2. Set External Boot to  'Allow booting from external media'.

 




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