Go to http://www.eclipse.org/downloads/ to download a copy of eclipse.
The download will go to your Downloads folder. You will normally have an icon for the Downloads folder on the right-hand side of the dock. Find eclipse-java-indigo-SR1-macosx-cocoa-x86_64-1.tar.gz. in your Downloads folder, and drag it to the Desktop. Then double-click it. You will see a folder named "eclipse."
Drag the "eclipse" folder into your Applications folder. The easiest way to do so is to open a new window in the Finder and click on Applications in the list you get on the left-hand side. Then drag the "eclipse" folder in with the other applications. Make sure that you do not drag it into a folder that's already within Applications. In other words, when you're done, the Applications folder should have directly within it a folder named "eclipse."
You have now installed Eclipse on your beautiful MAC! So simple as that using MAC!
