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This question already has an answer here:

MBP 2015 13, 10.12.2

I want to use an external display via HDMI and turn off my Macbook Pro's display. How can I do it?

Update

There is another question: How do I turn off laptop display when I have an external display?, but I don't think this one should be marked as duplicate.

Its 2017 now and the old question has answers from 2011-2014.

The other thing is - that the old question has also links to other answers and solutions. With this question we have answer with 2 variations of how to do it in one place.

marked as duplicate by grg, Allan, Ɱark Ƭ, IconDaemon, bmike macbook Jan 23 '17 at 0:13

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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    Are you using the internal keyboard and mouse at the same time with the external display or an external keyboard and mouse with the external display? If the latter, just close the lid on the MacBook as an external display, keyboard and mouse will work with the MacBook in clamshell mode. – user3439894 Jan 22 '17 at 15:01
  • @user3439894 I would use the internal keyboard and mouse if it possible – MikroDel Jan 22 '17 at 16:30
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    @MikroDel Can't you just turn down the brightness all the way then? – owlswipe Jan 22 '17 at 16:58
  • @owlswipe please update your answer with this information. It will have than both variation - I will accept it. thanks :) – MikroDel Jan 22 '17 at 17:05
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    The update needs to be edited - remove the "this isn't a dupe - that's for Ask Different Meta discussion" just make exactly clear how the current situation is materially different from the linked question (keep the link though). If the only difference is old - we strongly prefer to close as dupe and get the correct answer in the old thread. – bmike Jan 23 '17 at 0:14
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Using an external keyboard and mouse/trackpad

You can use Closed Clamshell Mode. This is a feature built in to Macbooks that allows you to use them like desktop computers, with the lid closed and using a monitor as your only screen.

You'll need:

To put your MBP into Closed Clamshell Mode:

  • Connect your keyboard and mouse/trackpad to the computer
  • Plug the computer into power
  • Connect it via HDMI or Thunderbolt to the external monitor
  • Close the lid

Once in Closed Clamshell Mode, the Macbook's screen will turn off and it will still be outputting picture to the monitor. Read more on Apple's support page.


enter image description here

Using the built-in keyboard and trackpad

You can dim your Macbook's screen all the way down (just press brightness down repeatedly) and then connect the Macbook to your monitor with HDMI. Your screen will be off but the keyboard and trackpad built into the Macbook will still be on and available. Optionally, you can download the free app Amphetamine to keep your Mac from sleeping.

enter image description here

  • 13
    Unfortunately, "turning down the internal monitor" is not a solution. When you dim the screen, it does not go off, you just cant see what's on it. when a window opens on this screen for example, its invisible - you can't find it. You have to keep putting the brightness up, moving the window, the putting the brightness down. We still need a way to use the keyboard and FPR and having the screen disabled. This is such a basic feature which is missing. Also, frequently when you close the lid, it's not possible to get the machine to come back on with USB keyboard and mouse. – John Little May 21 '18 at 7:12
  • @JohnLittle do any answers in the linked duplicate post fix the issue you speak of? I'm not really sure of a better way myself. – owlswipe May 21 '18 at 11:28
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    @JohnLittle is correct. Only the monitor backlight gets turned off, not the actual screen. Another solution would be preferable since keeping the screen opened helps keep the laptop cooler. – TheKarateKid May 30 '18 at 4:40
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    @JohnLittle if you have one external display, you can set display to "mirror", so then when you dim the laptop screen - you don't really lose much. – Tamik Soziev Dec 23 '18 at 22:53
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    @TamikSoziev thanks for the suggestion. Unfortunately, I have 2 x 32" external monitors, so mirroring is not an option in this case. – John Little Dec 27 '18 at 10:31

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