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Developers also received the second beta version of OS X Mavericks (10.9). It is intended for computers and can be downloaded via the Mac App Store as a software update. The new build is designated 13A497d, the previous version was 13A476u. An updated Xcode 5 developer tool and OS X Server are available.

So what has changed?

  • The operating system shows much higher speed and stability.
  • Minor improvements to the user interface in Safari.
  • Improves sharing and Messages buttons in Notification Center.
  • Setting up iCloud Keychain using the command line.
  • Migration Assistant is now functional.
  • Improved performance for selected files displayed in Preview.
Source: 9to5Mac.com
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