This is more of a placeholder than anything else;  I have an 
implementation of a toolbar UI that looks like the toolbars 
in Mac Finder.  Still needs a tweak or two, but they're pretty 
close.

Unfortunately, at present, our icons are much too tailored 
to Metal to make use of it - it just showcases, in an 
enhanced way, just how ugly NetBeans icons are.

Anyway, since others have shown interest, here's how to 
find it:

cd $NB_HOME/openide/loaders/src/org/openide/awt
cvs update -r osx_finder_toolbars -P -d

and build normally.