OSX Thunder....Thunder.....Thunder.....THUNDER CATS HOOOOOOOOOOOOO!
My sources tell me you're all wrong. Future versions of Apple's OS (which, for all I know, may not even be called OS X anymore) will NOT be using big cat names. The most plausible replacement I know about is wine names. Therefore, I expect OS X (or XI) "Chablis".
Per Sheldon Cooper: OS X 10.9 Soft Kitty, Warm Kitty, Little Ball of Fur...
Ocelot
Maru.
They are running out of cats to use what will be next?