AppleArt is an amazing set of Apple icons that you can use on Gnome-based desktop environments. In this tutorial we will help you install and enable AppleArt under Ubuntu 11.10/12.04 or older. Here are the icons used by this icon theme:
Open the terminal (Ctrl+Alt+T) and run this sequence of commands:
tar -xzvf AppleArt.tar.gz -C ~/.icons
gsettings set org.gnome.desktop.interface icon-theme 'AppleArt'
A screenshot of AppleArt under Ubuntu Oneiric:
For more icon themes, click here.