Years ago I found the original Amix emerald theme (http://gnome-look.org/content/show.php/AmiX+%28beta%29?content=55240) and shifted the buttons about a bit to reflect the MacOSX button layout.
However I moved away from emerald and to XFCE and missed the theme. So I learned how to theme XFCE.
Amix is the button set however not being great at image creation I used another theme MyeGTK (http://xfce-look.org/content/show.php/MyeGTK?content=123340) to fill in the graphics blanks.
In time I will figure out how to get the original Amix borders.