Mac OS 10.10 like close, minimize and maximize buttons for Ubuntu 14.04
Author: Aditya Samanta
License: No limitations, no warranty, no nothing!

How to use: Assuming themes are installed in your home directory (~/.themes)

Copy all icons of a desired size (Recommended size: 18x1
Go inside the desired themes directory, ex. ~/.themes/Flattice/unity
Paste and replace all icons
Logout or change the theme
Enjoy

Note: SVG files are read first, so in case you are using a theme that uses svg icons, you must manually delete all corresponding svg icons to make use of these!

cheers!