OS X El Capitan, the latest version of Apple's operating system for the Mac, is now available for download. The update is free through the Mac App Store, and is available for owners of Macs from 2009 or later, as well as some models from 2007 and 2008.

Also known as OS X 10.11, El Capitan improves and refines the Mac experience in a number of ways. There's a new Mission Control, a revamped Notes app, and enhancements to Safari. Apple has also added its Metal graphics framework to the Mac. For a more comprehensive picture of OS X El Capitan, be sure to read our review.