

Additionally, AirPlay compatible displays such as the Apple TV can be used as an external display. The menu bar and the Dock are available on each display. Mavericks and later versions are all available for free. OS X Mavericks can run on any Mac that can run OS X Mountain Lion as with Mountain Lion, 2 GB of RAM, 8 GB of available storage, and Mac OS X 10.6.8 (Snow Leopard) or later are required. On October 22, 2013, Apple offered free upgrades for life on OS X and iWork. 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, 10.9 would be available at no charge to all users running Snow Leopard (10.6.8) or later.

