[pimlottc]

I assume you mean Karabiner. Their page still has a notice that it doesn't work with macOS Sierra.

https://pqrs.org/osx/karabiner/

[Lio]

I did mean Karabiner, thanks for the catch.

I've stayed El Capitan because I couldn't think of anything I found compelling in Sierra. I'll probably reconsider when Karabiner-Elements becomes a suitable replacement.