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Following up on this morning’s release of iOS 7 beta 2 for iPhone, iPad, and iPod touch to developers, Apple has released the second Developer Preview of OS X 10.9 Mavericks. The new seed is available as a Software Update via the Mac App Store. The build number is 13A497d. This compares to Preview 1’s version number of 13A476u. As always, if you find something new, you can reach us at tips@9to5mac.com. Thanks, D!

We will update this post with changes tipped in.

Also available are fresh seeds of Xcode 5 and OS X Server. Below, we’ve compiled changes in the new Mavericks seed:

– Moving around and using the OS seems much snappier and more stable

– Minor UI tweaks in Safari

– Tweaks to share/Message buttons in Notification Center

– iCloud Keychain setup prompt

– Migration Assistant now functional

– Improved performance for select files viewed in Preview

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