I've been enjoying the simplicity of Xubuntu 15.04 and thought I would give it a OSX theme this month. The great thing about linux is the ability to make it look anyway you want. So below are my results and where you can get the Minty Mac OSX XFCE theme. I'm using the Minty Mac OSX metacity theme and icons, and the installed Greybird theme and an old wallpaper and Docky. I installed Clementine music player, Deluge bittorrent client, Chromium browser, and Screenlets. Enjoy.
You can get the Minty Mac OSX theme here: