Boot

Boot options

Press and hold during startup

Key combination

Description

cmd + v

Verbose

cmd + r

Recovery mode

cmd + s

Single user mode

C

Boot from Cd / DVD

D

Hardware Test

N

Boot from network

option

Select boot medium

Startup Security

To boot from an unsigned usb stick

  1. Boot into recovery mode

  2. Use the startup security utility from the utilities menu

  3. Allow boot from external media

  4. Disable secure boot signature check