Following the WWDC 2012, Apple has released Developer Preview 4 of Mac OS X Mountain Lion to developers. With the final release expected in July, we expect this to be the last developer release.Developers who have registered in the Mac OS Developer programs can get their hands on the latest developer preview of Mountain Lion, by heading over to the Mac Dev Center.
With OS X Mountain Lion, Apple continues to unify the experience across their mobile and desktop platforms. Popular iOS applications like iMessage, Reminders, Notes, Notification Center will be integrated into Mountain Lion.
iCloud integration will also be improved in the next version of Mac OS and personal information will be tied to your Apple ID and synced across your Macs and iOS devices.