What is the shortcut for switching the primary display when two monitors are connected. It is cumbersome to open up System Preferences > Displays and drag the menu bar across each time I switch.

Background: I have a makeshift IKEA standing desk and two monitors. One monitor is on my standing desk and the other is directly on the table (at sitting level.) Because I switch between sit/stand positions often, I want to switch the primary display so that all of my open windows are on the monitor I'm working on.

  • Is display mirroring an option? If you are only using one or the other at a time why not mirror?
    – bjbk
    Dec 22, 2016 at 21:38

1 Answer 1


It's not 100% clear how you're using your screens, but perhaps the following will work for you.

Let's assume your Primary monitor is on the sitting desk. When sitting this is fine, but when you're standing you could just use the Command + Brightness Down Keyboard shortcut to turn display mirroring on so that what's on the sitting screen appears on the standing screen. Then, you can use the same keyboard shortcut to turn display mirroring off when sitting again.

  • 1
    This doesn't quite work for me because I typically use my non-primary monitor to display a dashboard that I can glance at. When I switch from sitting to standing, I really just want to swap the displays quickly.
    – Blaine
    Dec 29, 2016 at 15:36
  • Man, have I been looking for this forever! Sometimes, when I clean my mac, I somehow enable mirroring while on lock screen. I went through all keyboard shortcut settings and Googled this forever... It happened again today and I somehow found this post! Now I know how to change mirroring! Ahhhh! THANK YOU! :D
    – ppseprus
    Feb 3 at 21:56

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