I am now seeing the fonts in the palettes in the gtk3 version for darwin! I natively compiled it against the macport built dependencies.
There were some warnings at startup:
/proc/self/exe: No such file or directory
(denemo:54476): Gdk-WARNING **: GdkQuartzDisplay does not implement the monitor vfuncs
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
I don't have rubberband or jack support yet.
Now I need to learn how to distribute this. This may fix the Mac Sierra thing. We will see.