How to upgrade to OS X Mavericks

Apple's next-generation desktop operating system, OS X 10.9 Mavericks, is now available on the Mac App Store as a free upgrade for all Mac users running Snow Leopard or above.

"Mavericks is an incredible release, which introduces significant new apps and features, while also improving the performance and battery life of your Mac," Federighi said in a news release.

In addition to performance enhancements, Mavericks brings iBooks and Maps from Apple's iOS mobile operating system. Maps is particularly deeply integrated into Mavericks, featuring prominently in updates to the Mail and Calendar apps.

Note: No installation discs required