I have the 2016 13" Macbook Pro w/o touch bar. I have a Presonus Audiobox USB interface connected to it. At first I was able to select it in the sound settings and it was working just fine. But when I turned on my MBP earlier, it didn't show up anymore. I've used different cables, adapters, power ons and offs, restarts, and still no luck. I've connected the Audiobox to my old Mac mini and it still works there. So I doubt it's a hardware problem with the interface. Any ideas?