In what should not be a significant surprise, Apple is already hard at work on OS X 10.9, the next major version of its Mac operating system. Signs of OS X 10.9 showing up in web logs were publicized [Google translation] earlier today by Czech site Letem svetem Applem, and 9to5Mac confirmed that some of the OS X 10.9 hits showing up on its own site were coming from Apple's corporate network.
It is trivial to fake such identification strings, meaning that at least some of the data should be considered untrustworthy. But hits identified as coming from Apple's own networks carry a much greater likelihood of being legitimate, and so it seems fairly clear that Apple is indeed using systems running OS X 10.9 to browse the Internet.
A release date for OS X 10.9 is currently unknown, but Apple has stated that is moving toward a more rapid development cycle on OS X, with OS X 10.8 Mountain Lion's July 2012 launch coming almost exactly one year after the debut of OS X 10.7 Lion. Assuming a similar timeline for OS X 10.9, Apple may begin releasing developer previews in early 2013 ahead of a public launch in the middle of the year.
Article Link: Early Signs of OS X 10.9 Unsurprisingly Showing Up in Web Logs