Mac App Store is the simplest way to find and download apps for your Mac.To download OS X Yosemite from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More. Description Upgrade your Mac to OS X Yosemite and you’ll get an elegant design that’s both fresh and familiar. The apps you use every day will have powerful new features. And your Mac, iPhone, and iPad will work together in