Now that I have my Hyper key working with Karabiner Elements, there’s one other feature I’ve been missing from the old setup: I used to be able to hold the s and d simultaneously to turn h, j, k, and l into vim navigation keys (←, ↑, ↓, →). That kind of simultaneous keypress mapping isn’t currently possible in the Sierra version of Karabiner, so I created a new solution.
This is a companion discussion topic for the original entry at https://brettterpstra.com/2017/07/26/hyper-key-vim-navigation-with-karabiner-elements