Previewed at WWDC, launching in the fall.
Apple Releases OS X Yosemite Developer Preview 5
The update can be downloaded from the Mac App Store and should be available through the Mac Developer Center shortly. Apple has also released new beta versions of Xcode, OS X Server, and Apple Configurator.
OS X Yosemite brings a flatter, more modern look to OS X, with an emphasis on translucency and redesigned dock, windows, and more. It also includes a multitude of new features, such as improved integration with iOS 8 through Continuity, a new "Today" view in Notification Center that offers integration with third-party apps, a retooled Spotlight search with new data sources, and several new features for apps like Mail, Safari, and Messages.
Over the course of the beta testing period, each Developer Preview has added new features and refined the look and performance of OS X Yosemite. DP 4, for example, added a revamped version of iTunes with a streamlined design and support for Family Sharing, while an earlier beta introduced a new Dark Mode.
Today's Developer Preview is limited to registered developers, but last week, Apple made a version of OS X Yosemite available to the public as part of a wide-ranging beta test. The pre-release version of Yosemite available to those participating in the public beta program is not expected to receive as many updates as the developer version.
Notable changes in DP 5:
System Preferences - System Preferences has an updated look with a slightly redesigned top bar.
Launchpad - Launchpad has a new download progress bar.
Volume/Brightness Controls - The Volume and Brightness controls in Yosemite have a new look.
Calculator - The look of the redesigned Calculator has been tweaked slightly and it is now more transparent.
Safari - There's a new setting in Safari to show full website addresses.