Probably not. As with a real Mac, you'll have to download the installing file from the MAS. However, for a hacktinosh, you'll have to use the UniBeast/MultiBeast as you did on your first, fresh install. Keep in mind, though, you can install over your Mavericks (back it up first, of course) to keep your applications and settings. Note: I'm referring to the public release version of Yosemite later this month. Installing a beta version over your Mavericks installation is not recommended.It will be possible to upgrade from Mavericks to Yosemite like a real Mac, from Apple Store or from a Combo .dmg/.pkg?
tony what about iMessage and FaceTime? because will FileNVRAM be updated? also i use Chameleon in order to get iMessage and FaceTime to work