Running GtkD programs on macOS

[Joel]

I've used dub alright, but don't know how to install the dylib 
files:

object.Exception at ../../../../.dub/packages/gtk-d-3.9.0/gtk-d/generated/gtkd/gtkd/Loader.d(125): Library load failed (libatk-1.0.0.dylib): dlopen(libatk-1.0.0.dylib, 258): image not found

What's a good way to fix this problem?