Macbuntu is one application that can change the look of your Ubuntu look like Mac OS.Macbuntu - Mac OS X Transformation Pack. Macbuntu is an open-source programs, Designed to transform Linux's appearance and layout into a Mac OS X environment. Although Macbuntu is dedicated to the Ubuntu Linux OS, it could be used in other OS based on Debian / GTK. The application is almost similar to the Snow Transformation Pack used on windows.

How to install Macbuntu 10.10 v2.3

Open a terminal and type the following commands:

$ wget https://downloads.sourceforge.net/project/macbuntu/macbuntu-10.10/v2.3/Macbuntu-10.10.tar.gz -O /tmp/Macbuntu-10.10.tar.gz

$ tar xzvf /tmp/Macbuntu-10.10.tar.gz -C /tmp

$ cd /tmp/Macbuntu-10.10/

$ ./install.sh

How to remove Macbuntu 10.10 v2.3

Open a terminal and type the following commands:

$ cd ~/.macbuntu/10.10-2.3/

$ ./uninstall.sh 

source : http://sourceforge.net/projects/macbuntu/forums/forum/1205032/topic/3819181