June 2, 2014: Apple shows off Mac OS X 10.10 Yosemite for the first time at its Worldwide Developers Conference in San Francisco. Following the Jony Ive-redesigned iOS 7, Yosemite boasts an aesthetic ...

Apple only sells OS X Mountain Lion as a digital download in the Mac App Store. The installer weighs in at a hefty 4.05GB, but the good news is that you can install your copy of Mountain Lion on all ...