If you too want to "transform" your operating system to resemble Mac OS X , there are many themes out there that you can use for this purpose. "Gnome-Cupertino-n" is just one of them, and it's definitely worth a try.
Most themes of this kind are compatible with graphical environments like GNOME, MATE, Xfce, and so on, but not all of them work with Unity. This particular version of "Gnome-Cupertino-n" is built for GTK 3.10 and also works with Ubuntu.
The theme developer reports on gnome-look.org that he is working on a new version for GTK 3.12, which is not yet complete.
If you want to install "Gnome-Cupertino-n" you'll have to do it the old-fashioned way, placing the folders in the appropriate locations. Then you'll have to use an application like Ubuntu Tweak to enable the theme.
You can download gnome-cupertino-n now from gnome-look.org and try it out.
