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Apple's OS X Mavericks Developer Preview 3 Now Available

Along with iOS 7 beta 3, Apple has made OS X Mavericks Developer Preview 3 available to download for registered developers. The third prerelease software update, which launched two weeks after OS X Mavericks Developer Preview 2 became available, appears mainly to contain bug fixes and performance improvements for Apple's forthcoming Mac OS X update. Here are the release notes:
Installation:
  • Network migration from earlier versions of OS X requires the Migration Update for Snow Leopard, Lion, or Mountain Lion available form the Mac Dev Center.
  • Migration from Windows is not supported in Developer Preview 3.
  • Reinstalling Developer Preview 3 from the Recovery Partition is not supported. Developer Preview 3 can be reinstalled using a Time Machine backup or Target Disk Mode.
iCloud and iCloud Keychain:
  • The Reset Keychain button in Account Details of the iCloud preferences pane is for testing purposes and will not be available in the final release.
  • First time iCloud setup may fail. Disabled services may be manually enabled in the iCloud preferences pane.
  • After upgrading to Developer Preview 3, iCloud Keychain will need to be re-enabled in the iCloud preferences pane.
  • iCloud Keychain in OS X Mavericks Developer Seed 3 is not backward compatible with iOS 7 Seed 2 and OS X Mavericks Developer Seed 2.
  • When enabling iCloud Keychain, a blank sheet may appear. Force Quit System Preferences and retry.
Third-Party Applications:
  • Installation within a virtual machine is not supported for VMWare Fusion.
  • Adobe After Effects CS6 will not function correctly.
Other:
  • Screen recordings taken with Developer Preview 3 are not compatible with earlier releases of OS X.
  • The QuickTime Player progress bar may be nonfunctional when opening media that requires conversion prior to playback.
  • Aperture may exit unexpectedly when exporting an image while in full screen.
  • Moving a full-screen Aperture window to a secondary display may prevent the app window from being visible in subsequent attempts to use full screen.
  • When saving from Photoshop, ‘Save As’ may not respect selected filetype.
  • Maps may display some graphical corruption when resizing windows or switching from standard to satellite view.
  • Fusion Drive volumes created with Developer Preview 3 are not compatible with OS X version 10.8.4 or earlier.
  • The headphone port on the new 2013 MacBook Air will not operate unless headphones are present at boot.
  • On some machines, frequently sleeping and waking may result in the machine restarting.
  • Developer Preview 3 includes OpenSSH 6.2p2.
As a reminder, Apple is adding a built-in Maps app, Finder tags and tabs, battery life improvements, and a faster Safari Web browser in OS X Mavericks, which will launch later this year in the Mac App Store. More than a handful of these features are indeed taken from the company's mobile operating system, in a move which continues the trend Apple established a couple of years ago with its "Back to the Mac" event. We'll keep you updated with further information on OS X Mavericks as we receive it. In the meantime, see: Could Offline Dictation Be Heading To iDevices In iOS 7?When It Comes To The Desktop, Apple Could Learn From Microsoft And Vice Versa, and OS X Mavericks Beta 2 Now Available To Download In The Mac App Store.
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