This is great news! I’m looking forward to Apple’s next major update to OS X. Good advice from Dan Frakes at Macworld.com…
Apple has released to developers the golden master of Mavericks (OS X 10.9)—the final non-public version, and most likely the build that will become the official 10.9.0. That means that the official public release of Mavericks isn’t far off. We’re still waiting on a specific date for that release—at WWDC earlier this year, Apple said only “this fall”—but for those aiming to upgrade as soon as the new OS drops, the golden master means that now is the time to start getting your Mac ready for Mavericks.
via Get your Mac ready for Mavericks (OS X 10.9) | Macworld.