Announced tonight in Apples Key Note. Yosemite is released today. Look out for it coming down the pipes at you. P.S. After the initial download of Yosemite there are additional downloads after the OS has set itself up. These additional downloads are Garage Band, Pages, iMovie, iPhoto, (Aperture if you have the Mavericks one installed), and Keynote. Also if you use iStats there is also an update for that too, as the Mavericks edition will not run on Yosemite.