I found System Preferences → Keyboard → Modifier Keys menu, but I can map other modifier key to it, not a keyboard shortcut.


Expanding answer of @mrded for macOS Sierra.

I used Karabiner-Elements to remap caps_lock to f19. To this end I placed the following file karabiner.json to ~/.karabiner.d/configuration:

    "profiles": [
            "name": "Default profile",
            "selected": true,
            "simple_modifications": {
                "caps_lock": "f19"

Then I opened Keyboard preferences → Shortcuts → Input sources and selected F19 as "Select the previous input source" option.

Note also that according to Lifehacker, there is built-in feature in macOS Sierra to switch layouts with Caps Lock but it seem to work only with some layouts. (At least I don't see this feature for my layouts which are Ilya Birman's typographic Latin/Cyrillic.)

  • I tried this solution but it doesn't work on macOS Sierra 10.12. When I press Caps Lock in Input Sources while trying to change hotkey for input sources, nothing happens :( – Shersh May 10 '18 at 2:40

It depends on the version of Mac OS X you are running (on 10.13.5 it's definitely possible). System settings -> Keyboard -> Input sources -> checkbox about Caps Lock


If your keyboard language layout pair is English-Russian you can try to use Punto Switcher from Yandex for Windows and Mac. It not about Caps, but about what you typing - for example it will automatically replace ghbdtn to привет.


It can be done with Seil or Karabiner if you use Mac OS 10.12 Sierra.

The Idea is to overwrite Caps Lock with another useless key, lets say F13, and then use that key to change keyboard layout.

  • Only karabiner doesn't work with Sierra at the moment. – devmiles.com Oct 5 '16 at 9:56
  • It works perfect on my Sierra. – mrded Oct 5 '16 at 20:03
  • only Karabiner-Elements worked for me. – devmiles.com Oct 6 '16 at 13:07

Unfortunately, what you want to accomplish cannot be done with what OS X gives you. I have hacked a keyboard layout to switch to Cyrillic when Caps Lock is on, but it's a bit ugly - everything happens within the same actual keyboard layout (flag in menu bar does not change), and some apps behave funny with it (most shortcuts do not work in Mozilla-based software, for example). Ukelele is your friend here, as Felix pointed out, but I would love to find a true solution to have Caps Lock switch the actual layouts.

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