IDG Contributor Network: macOS: How to enable Night Shift

Staring at a computer screen late at night can be bad for your sleep. Flux is an application that many Mac users have used to change the colors of their display so they see warmer colors after dark. I've used it for a long time on my iMac and it has worked very well for me.
Now Apple has created its own version of Flux called Night Shift that lets you do the same thing. To use Night Shift you need macOS Sierra 10.12.4, which is still in beta as I write this post. But once macOS Sierra 10.12.4 i