OS X Mavericks

OS X Mavericks (10.9.x) is a version of Mac OS X released in 2013. This version focuses on battery life improvement, and increased iCloud integration.

Features

 * App Nap was introduced, which sleeps apps that are not currently visible.
 * iCloud Keychain stores a user's usernames and passwords.
 * AirPlay compatible displays such as the Apple TV can be used as an external display.
 * Finder has acquired tabs, fullscreen support, and document tags.
 * New apps were added: iBooks and Maps.