This is definitely what you've been waiting for! Developers Preview Apple Mac OS X 10.10 Yosemite.
very bit as powerful as it looks.
An elegant design that feels entirely fresh, yet inherently familiar. The apps you use every day, enhanced with new features. And a completely new relationship between your Mac and iOS devices. OS X Yosemite will change how you see your Mac. And what you can do with it.
Download FileApple OS X 10.10 Yosemite DP1 Build 14A238x
OS X Yosemite 10.10 DP1.dmg