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macOS Commands

Tue 17 January 2017

Start Up Commands

Hold during startup Description
Shift Start up in Safe Mode.
Option Start up to Startup Manager.
C Start up from a bootable CD, DVD, or USB thumb drive (such as macOS install media).
D Start up to either Apple Hardware Test or Apple Diagnostics, depending on which Mac you're using.
Option-D Start up to either Apple Hardware Test or Apple Diagnostics over the Internet.
Command-R Start up from macOS Recovery.
Option-Command-R Start up from macOS Recovery over the Internet.
Command-S Start up in single-user mode.
X Start up from an macOS startup disk when the Mac would otherwise start up from a non-macOS startup disk.
Command-V Start up in verbose mode.

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