Following the recent release of the OS X Mavericks Gold Master, and ahead of the October 22 event at which Apple is expected to announce the final retail release of Mavericks, Apple has issued an email to developers informing them that they can now submit submit new apps and app updates optimized for OS X Mavericks.
From the e-mail:
Submit your OS X Mavericks apps today.
Make sure your app takes advantage of the great new features in OS X Mavericks when the world’s most advanced desktop operating system becomes available to millions of customers later this fall. Download OS X Mavericks GM seed and Xcode 5.0.1 GM seed, available on the Mac Dev Center. Build your apps with these latest seeds, then test and submit them to the Mac App Store.
Mavericks introduces a host of new features that developers should be excited to support, and the fact that Apple is now officially allowing OS X Mavericks app submissions, and encouraging developers to submit Mavericks-related updates, only adds to the confirmation that the update should become available in the very near future.