OS X Lion
The 10.7 version of OS X Lion for Mac is available as a free download on our website. The application lies within System Tools, more precisely General. This Mac application was originally developed by Apple Inc.
From the developer:
Apple OS X Lion is built on a rock-solid UNIX foundation, engineered to take full advantage of the technologies in every new Mac, and designed to deliver the most intuitive and integrated computer experience possible.
Hardware and software made for each other. Since the software on every Mac is created by the same company that makes the Mac, you get a fully integrated system in which everything works together perfectly.
You may want to check out more software for Mac, such as Migration Assistant Update for Mac OS X Lion, Mountain Lion Secrets or Learn - Lion Edition, which might be similar to OS X Lion.