One feature of Mac OS X Mountain Lion users won’t have to wait for is Messages, Apple’s replacement for iChat. Messages allows users to send and receive free SMS and MMS style iMessage texts to and from iOS 5 devices on a Mac.
iMessage, introduced in iOS 5, is an Apple-only messaging service powered that bypasses carrier text message systems and allows free and direct text, photo, and video messaging between iOS 5 devices. Messages on the Mac makes it easy to do the same from your iMac or MacBook.
A beta of the app is now available for download.