This theme is based on these great works.
MacOS-X Aqua Theme, T-ish, Mac OS X Bundle, OSX-tiger theme, Samui, AquaExtremeSunken, tAqua, aqua scrollbars.
Kougyoku is a kind of apples. It’s called Jonathan in English.
Kougyoku includes four themes.
(For Mac-style Menu Bar)
While it might be the best aqua-esque theme for Gnome, it totally sucks on tabs and text-fields (Evolution search box). Firefox also fails to adapt well (like the menu background).