OS X Mavericks (version 10.9) is the tenth major release of OS X, Apple Inc.'s desktop and server operating system for Mac computers. OS X Mavericks was announced on June 10, 2013, at WWDC 2013, and was released on October 22, 2013, as a free update through the Mac App Store.
The update places emphasis on battery life, Finder enhancements, other enhancements for power users, and continued iCloud integration, as well as bringing more of Apple's iOS apps to the OS X platform. This release marks the beginning of a change in the naming scheme of OS X, departing from the use of big cats and moving to names based on places in California. Following the new naming scheme, the current version of the operating system is named Mavericks, after the surfing location in California.
OS X Mavericks was officially announced by Apple during the company's 2013 Apple Worldwide Developers Conference (WWDC) keynote, held on June 10, 2013. iOS 7, a revised MacBook Air, the sixth generation AirPort Extreme, the fifth generation AirPort Time Capsule, and a completely redesigned Mac Pro were also announced during the keynote. During a keynote on October 22, 2013, Apple announced that the official release of 10.9 on the Mac App Store would be available immediately, and that unlike previous versions of OS X (which however, have had progressively decreasing prices since 10.6), 10.9 would be available at no charge.
