I want to map CapsLock to Left Mouse Button using Karabiner Elements in macOS Sierra.

I used to have such mapping in previous OS X versions using Seil and Karabiner but those no longer work in Sierra.

I tried to guess what should I put in the configuration JSON but failed.

"simple_modifications" : {
    "caps_lock" : WHAT_SHOULD_I_PUT_HERE?

Is it even possible to map Caps Lock to Left Mouse button in Karabiner Elements?

  • From looking at the examples, it doesn’t appear to be possible yet. If it does I think it might be a Complex Modification.
    – jasonology
    Aug 22, 2017 at 3:44

1 Answer 1


BUT: it's actually quite simple (if I didn't mis-interpret your question):

Just select [Add item] in K.-Element's "Simple Modifications" tab, choose "caps_lock" (left) and "button1" (right) – and you're DONE!

… no need for "Complex Modifications", btw.

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