OS X Mountain Lion Developer Preview 4 Released for Developers to Download
OS X Mountain Lion Developer Preview 4 was released for developers today as build 12A239. To access DP4, registered developers will need to log into the developer center and retrieve a download code which can be used within the Mac App Store.
Apple hinted at WWDC2012 that Developer Preview 4 was close to the release candidate, and then announced that OS X 10.8 will be available to everyone through the Mac App Store next month for $20. Though DP4 is the most stable beta release yet, it still has a fair amount of bugs and is therefore only appropriate for developers to use.
On a random note, the Dock in OS X 10.8 DP4 got a slight UI update and looks quite nice as shown in this screenshot from ManiacalRage: