Apple Releases OS X Mavericks Developer Preview 4
Apple has seeded the fourth Developer Preview of OS X Mavericks to developers, some two weeks after the release of Developer Preview 3.

OS X Mavericks is slated for release this fall and includes new features like a tabbed Finder, full screen dual monitor capabilities, Safari improvements, and a new Maps app. Developers can receive the update via the Software Update tool in the Mac App Store.
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