OS X Yosemite has been released by Apple [Links]. All who want download this new OS X 10.10 with new design, features and specs can do it now. If you don't have developer account - you can install OS X Yosemite on your Mac!!! I've worked on new OS X Yosemite since WWDC 2014. I think - it's best desktop OS for yours Macs. Light design, new features. All for yours Mac.
You can see complete list OS X Yosemite supported Macs here:
- iMac (Mid-2007 or newer)
- MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or newer)
- MacBook Pro (13-inch, Mid-2009 or newer), (15-inch, Mid / Late 2007 or newer), (17-inch, Late 2007 or newer)
- MacBook Air (Late 2008 or newer)
- Mac Mini (Early 2009 or newer)
- Mac Pro (Early 2008 or newer)
- Xserve (Early 2009)