Step 1. Download the mac4lin files from here
Step 2. Right-click on the downloaded file and click extract.
Step 3. Open the MacLin_Install_Mod folder and double click “Mac4Lin_Mod_installer.sh“. When prompted, select “Run in Terminal“.Step 4. Your theme will start to change. In the Terminal that pops up, when it prompts you to install the components that require root access (or something along the lines of that - look at the screenshot below), type ‘y‘ (without the quote) and press enter.Step 5. Again in the same Terminal, when it asks you for a choice to select the bootup screen, type ’0′ (without the quote).
Step 6. When you see the message “Type any key to continue…“, just press enter, and you have nearly finished transforming your desktop to Mac. All we need to do is sort out the menu at the top and the dock at the bottom
Step 7. To get the Mac menu on the top panel, you need to open a Terminal (Applications, Accessories, Terminal) and type in the following commands: sudo add-apt-repository ppa:globalmenu-team Press enter, and type in your login password when prompted. This command has added the program to our list of applications that we can instal l Then, type in the next command: sudo apt-get update && sudo apt-get install gnome-gl obalmenuAnd press enter. This command has updated our list of programs and installed the menu for the panel. Now run this final command: killall gnome-panel This will stop the panels and restart them so we can put the new menu on. Close the Terminal now. Step 8.Remove the menu at the top left of the panel (right click and select "Remove from panel") and remove the icons at the top left as well. This should leave room at the left for us o put the mac menu. Don't remove anything at the top right. Step 9. Right click on the top panel and select Add to Panel. Select Main Menu, followed by the global menu panel applet. You should see something like the screenshot below:Step 10. Open up another Terminal and type this in: sudo add-apt-repository ppa:awn-testing/ppa And then type in sudo apt-get update && sudo apt-get install avant-window-navigator If necessary, type 'y' in when prompted. The dock should now be installed. Before we can use it, we need to do two things, remove the bottom panel (right click at the bottom panel and select Delete This Panel).and get Compiz (compiz is what allows us to do complex colour rendering - make the dock work) working (right click on the desktop and choose change desktop background. go to the visual effects tab and click on extra. This will install Compiz if your pc supports it. if not, then us e the built-in compositing manager, by going to menu, preferences, desktop settings and clicking on the window tab and then checking use gnome compositing) Step 11. download this theme first. Launch the dock (menu, accessories, avant-window-navigator) and then clickon the leftmost icon on the dock.this should bring up a settings windowClick on the theme tab, and click on add theme. then n avigate to where you saved the awn theme download (called perfect-macdock or something.) once added, click on it and choose apply. your desk top should look like a Mac. If you want to add widgets to your desktop, then in a Terminal, type sudo apt-add-repository ppa:screenlets-stayinalive/screenlets sudo apt-get update sudo apt-get install screenlets Then, start screenlets, (Applications, Accessories, Screenlets) and a box should appear.
Choose the screenlet you want to add, and it will appear on your screen, probably in the top left. Drag it to where you want it to be. To edit the settings for a particular widget, right click on it and choose properties, or settings. IF THIS DIDN'T WORK, PLEASE COMMENT AND LET ME KNOW.