Some keyboards have a light that flashes briefly at startup, indicating that the keyboard is recognized and ready for use.
![mac command key to standbye mac command key to standbye](http://www.expertmanpc.com/images/Add-Ons/d0sjsl_2.jpg)
Mac command key to standbye mac#
You might need to wait a few seconds before pressing the keys, to give your Mac more time to recognize the keyboard as it starts up.
![mac command key to standbye mac command key to standbye](https://venturebeat.com/wp-content/uploads/2020/04/Copy-of-Caroline-Winnett-with-Violin-at-SkyDeck.jpg)
Then press and hold the keys as your Mac starts up. Then press the power button to turn on your Mac.
![mac command key to standbye mac command key to standbye](http://docs.hardentheworld.org/_images/settings_security_9.png)
Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet. Command (⌘)-R: Start up from the built-in macOS Recovery system.Keep holding until the described behavior occurs. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart.