Mavericks

OS X Mavericks (version 10.9) is the tenth major release of OS X, Apple Inc.'s desktop and server operating system for Macintosh computers. It was released as a free update. The update emphasized battery life, Finder improvements, other improvements for power users, and continued iCloud integration, as well as bringing more of Apple's iOS apps to OS X. Mavericks, which was named for the surfing location in California, was the first in the series of OS X releases named for places in Apple's home state; earlier releases used the names of big cats.