I've been using Windows for most of my life and at this point I've developed a muscle memory to use Shift + Alt when I want to change language.

Using Macbook Air With macOS Big Sur (11.6) as my personal laptop and I was frustrated to learn that I can't simply go to System preferences and assign Shift + Command to change input source... from what I understood you need a 3rd party tool for that.

  • I've tried Punto Switcher but it crashes from time to time on my M1 Mac and looks like it hasn't been updated in a while.
  • Karabiner is confusing to setup and it caused me a kernel panic once. =(

Is there another small (and preferably free) app that will allow me to assign key shortcuts to input source selection?

  • 3
    General Apple rule: You cannot use only modifier keys as a key command, you must have an alphanumeric [letter, number, symbol - or an f-key, which can be solo]. To use only modifiers would be intercepted before any other key command which used them & thus prevent the use of all of them.
    – Tetsujin
    Dec 20, 2021 at 13:06
  • @Tetsujin makes sense, but still it's kind of a bummer =( Dec 20, 2021 at 13:08

1 Answer 1


I've found an app called CommandShift, it allows to change language using "Command+Shift, Option+Shift, Control+Shift or Fn+Shift" which is exactly what I need. It's free and gets the job done.

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