Installing Mac OS theme on Ubuntu 10.04 (Lucid) is easy and straightforward.
Step 1: Install Gstyle (Gstyle is a full Gnome Theme Manager)
sudo add-apt-repository ppa:s-lagui/ppa
sudo apt-get update
sudo apt-get install gstyle
Step 2: Once it is installed successfully. Launch Gstyle application (System -> Preferences - > Gstyle).
Step 3: Click on Download button and then Click on Refresh button. Select Mac4Lin theme from the list.
Step 4: Then in each category option in the left panel of Gstyle, select Mac4Lin. I choose Mac4Lin Aqua.
Step 5A: Now to Configure Global Menu (Top panel bar). Perform following steps:
sudo add-apt-repository ppa:globalmenu-team
sudo apt-get update && sudo apt-get install gnome-globalmenu
Step 5B: Once done, remove all stuffs from top left panel (Right click on the panel and select “Remove from Panel”). Right click on the top panel and select Add to Panel. Select Main Menu, follow by the Global Menu Panel Applet. Close the window. Now move the two items (right click and select Move) to the left hand corner and make sure they are side by side.
Step 6A: Now to configure Dock (Bottom panel bar). Perform following Steps:
sudo apt-get install cairo-dock
There are lot of dock application, but I found this one is easy to use.
Step 6B: Before you launch the Cairo dock application, remove the bottom panel (right click at the bottom panel and select Delete This Panel). Cairo dock needs a compositing manager to work, so make sure that your system support Compiz before launching the app. Launch Cairo dock (Menu -> Accessories -> Cairo Dock). Make sure to set it to launch everytime you startup your computer.
Only if your system does not support Compiz: You can activate the in-built metacity compositing manager with the command:
gconftool-2 --type boolean --set /apps/metacity/general/compositing_manager TRUE
To change the logo in the panel bar with apple logo:
1. Download apple logo from google.
2. Then go to /home/urprofilename/.icons/Mac4Lin_Icons_v1.0/scalable/places folder. Check the resolution of distributor logo.png file. It may be 78 * 96. Now rescale the image you downloaded into 78 *96 or 96*96 size.
3. Then replace distributor-logo.png, gnome-main-menu.png, main-menu.png, and start-here.png with the apple logo file.
4. Open the terminal window and type killall gnome-panel to restart the gnome-panel. Now you should see your new icon.