1. How To Turn Off A Mac Using The Keyboard Commands
2. Turn Keyboard Back On

Not interested in attracting mosquitoes? Keen to save battery and power? Find out here how to quickly turn off the screen on a Mac at any time using the mouse or the keyboard.

The goal is to add a short-cut to turn off the screen and lock the computer at the same time for MacBooks with touch bar. Just install BetterTouchTool, and create a keyboard shortcut 'Ctrl + Shift + Del' for turning off the screen. Ctrl + Shift + Eject turns both displays off. The idea here is to turn only the MacBook display off while keeping the Thunderbolt display on. 1) Hold down the Alt key and press the F4 key, which is along the top row of keys on the keyboard. (You may have to do this more than once, if you have other windows or programs open.) 2) Press the U key on the keyboard.

First, a Goddess Wrapped around the Dark Side

of the known earth had an important function in Ancient Egypt: Nut swallowed the sun at night to end the day and, in the morning, gave birth to it so a new day could begin.

Now, how about having your Mac screen’s bright light swallowed at will and any time (without putting the whole computer to sleep)?

How to Turn Off the Screen on a Mac (Without Putting It to Sleep)

Using a Keyboard Shortcut

Time needed: 1 minute.

To quickly turn off your Mac’s screen at any time:

1. Press ControlShiftEject.

   Tip: The Eject key usually shows ⏏.
   Note: If your Mac’s keyboard lacks an Eject key, you can use hot corners to black out the screen using mouse or trackpad or set up a custom keyboard shortcut; see below.

2. Press and key, click a mouse button or tap on a trackpad to wake the screen again

   Note: Merely moving they mouse pointer or touching the trackpad will not turn on the screen.

Hours later…
Ready to go to sleep now but your Mac apparently is not? How to find out why your Mac Is not going into sleep mode

Using a Hot Corner on the Screen

To set up a corner on the screen to turn off the display:

1. Select System Preferences… from the Apple () menu.
2. Open the Desktop & Screen Saver category.
3. Make sure you are on the Screen Saver tab.
4. Click Hot Corners….
5. Now pick a corner to turn off the screen and select Put Display to Sleep for that corner.
   Tip: You can require one or more keys to be pressed while the mouse cursor is in the corner for the display to be turned off; hold down the desired key or keys (Command, Control, Option, Shift and any combination) while selecting the Put Display to Sleep from the corner action’s menu.
   Hint: You can make more than one corner turn off the Mac screen, too.
6. Click OK.
   

Now, to turn off the screen with a flick of the mouse cursor:

1. Move the mouse cursor to any corner configured to turn off your Mac’s screen.
   Hint: If your hot corner requires holding down a key, you can let go of the key before you release the mouse.

Using the Command Line

To immediately turn off the screen on any Mac running macOS from Terminal (or any tool that can run command line scripts and applications):

1. Open Terminal.
2. Type How To Turn Off A Mac Using The Keyboard Commands

   How to Turn Off the Screen on a Mac: FAQ

   How can I make sure my Mac does not go to sleep with the display off?

   Of the countless ways to keep a Mac awake, one is particularly easy and typically at hand:

   1. Open Music on Mac (or iTunes).
   2. Pick a random song.
      Tip: I’m partial to Telemann, Paul Desmond, and Silvius Weiss; and a few precious birds’ songs, of course.
   3. Play it on repeat.
      Be safe: Do not play a radio station; iTunes may automatically stop playback after some 2 hours or when it runs out of things to play deemed interesting enough.
      Tip: You can set up a keyboard shortcut for looping one song.

   Looking for a nonmusical solution? Find out how to prevent a Mac from sleeping.

   Turn Keyboard Back On

   (How to turn off the screen on a Mac tested with macOS Big Sur 11.0 and macOS Catalina 10.15; updated November 2020)