This looks like the biggest visual change to the Mac OS since OS X first debuted in 2001. It's very exciting to see the new look and all the great new features coming to the Mac this fall. Just like Mavericks last year, Yosemite will be a free download from the Mac App Store.
Redesigned Interface. Learn More
Powerful built-in apps. Learn More
Mac and iOS – connected like never before. Learn More