OS X 10.10, better known as Yosemite, is Apple's latest, greatest operating system for the Mac. It includes a new, flatter, more vibrant design, continuity to create a seamless experience with iPhone and iPad, extensibility to let developers hook their apps into the system, and a host of other features. If all you have is 6 minutes, here are all the highlights. If you want to know much, much more, check out our in-depth OS X Yosemite review.