On August 28, 2009, it was released worldwide and was made available for purchase from Apple's website and its retail stores at the price of US$29 for a single-user license.
Mac OS X 10.7 was publicly unveiled on June 8, 2009, at the Apple Worldwide Developers Conference.
Mac OS X 10.7 is the recent major release of Mac OS X, Apple's desktop and server operating system for Macintosh computers.
