Command Line Tool to Toggle Mirroring

Tips & Tutorials
1

I've been looking for an easy way to toggle between "Mirror" and "Don't Mirror" when using Luna Display with my MacBook Air.

Turns out there a command-line tool for this called… wait for it… mirror.

There's even an app called "MirrorDisplays.app"

You can find the app and command-line tools pre-compiled at
https://fabiancanas.com/open-source/mirror-displays

Source code is available at https://github.com/fcanas/mirror-displays

Here's the options available for mirror:

usage: mirror [option]	Only the first option passed will be applied
  -h		Print this usage and exit.
  -t		Toggle mirroring (default behavior)
  -on		Turn Mirroring On
  -off		Turn Mirroring Off
  -q		Query the Mirroring state and write "on" or "off" to stdout
  -l A B	Makes display at index B mirror the display at index A

If you use launch the app, it will run toggle the current status and just immediately quit.

I wanted a Keyboard Maestro macro, of course, so I set hyper+M as "Toggle Mirroring" to run the command line tool in a Keyboard Maestro shell script rather than using the app.

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