Just a little issue, hoping for some support

[DanielG]

Would be nice to know the results of your "reading up and down for over an hour, on diff sites and forums". Because you're bound to get suggestions that you already saw in your hours of research but didn't work.

Anyway you could try to update to Xcode 8.2.1 (8C1002) which is the latest that will run on 10.11.5. I think the easiest way is by running 'xcode-select --install'.