The update emphasized battery life, Finder improvements, other improvements for power users, and increased iCloud integration, as well as bringing more of Apple's iOS apps to OS X. OS X Mavericks was announced on June 10, 2013, at WWDC 2013, and was released on October 22, 2013, worldwide. OS X Mavericks (version 10.9) is the 10th major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh computers.
