OS X Mavericks
The same day as the release of iOS 7 beta 3, Apple has released OS X Mavericks Developer Release 3. The update is available for download from Apple's developer Web site. The build number is 13A510d.
Apple has posted iBooks Update 1.0.1 for Mac users who are using OS X 10.9 Mavericks. The update is available through Software Update.
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