Have you used the caps lock key as hyper key on your mac? Hyper key is an additional key that you can create on the mac which is a combination of Ctrl +Alt+ Option+ Shift in one key. I had my Caps lock key working as a Hyper key ever since I read about it on a blog post in 2014. Ever since then, the caps lock key has always been a hyperkey on my mac until Apple decided to revamp the keyboard configuration files for touchbar support in Sierra. I dearly missed the feature for about two weeks after I upgraded to sierra and that is when I realized how interwoven the hyper key was with my workflows and mac usage. Nearly every workflow that I had broke. I was on the constant lookout for getting the hyperkey back and used the custom build of the karabiner elements here until I found this easier and streamlined workflow.
The reason why you should use this latest work around instead of the custom build is that you can update karabiner elements. Using the custom build restricts the updates. The config file (json) is pretty simple and has just the options for the hyper key, which makes life so much simpler. If you are like me, just using the caps lock key as the hyper key, the json file here will save your life.
If you haven’t tried the hyper key, you should defintely try it.