"Top Gun"
For context's sake, we've also heard rumors that the new Mavericks will launch alongside iOS 7, which we know is due out later this month.
9to5
Apple first announced Mavericks at its WWDC developers conference in June. But it seems like Apple is diverting resources to get iOS 7 out the door in time for its new iPhone launch later this month.
As a refresher, Mavericks offers several improvements over the Mountain Lion, the current Mac OS.
Improvements include multiple tabs in the Finder window, the ability to tag files with keywords for the sake of search, and many more you can read about here.