Apple today released a developer preview of OS X Mountain Lion, an operating system that unifies the Mac experience even further across the desktop, iPad and iPhone. The upgrade will be available to the general population of Mac users in late summer 2012.

One of the most interesting new features is Gatekeeper, a security feature that gives users more control over installing apps.

Mountain Lion also is the first OS X built specifically to take advantage of the iCloud storage and synchronization capabilities. Satisfying many users’ wish lists, it also brings some popular features from the iPhone to the Mac, including Messages, Notes, Reminders and Game Center.

Related links:

Press release –

Cult of Mac – Want A Taste Of Mountain Lion?

Macworld – Hands on with Apple’s new OS X: Mountain Lion

Pocket Lint – OS X Mountain Lion detailed as dev build goes live

The Next Web – Apple unveils Mac OS X 10.8 ‘Mountain Lion’ as iOS continues its push to the desktop

CNET – Apple Mac OS X ‘Mountain Lion’ takes more bites out of iOS