“The Messages app introduced alongside OS X Mountain Lion will become exclusive to the new OS after the current beta period has finished, French site Consomac says it has learned,” MacNN reports.
“Buried in text strings for the app is a future alert for users of the Lion-based beta,” MacNN reports. “‘Thank you for participating in the Messages Beta program. With the inclusion of Messages in OS X Mountain Lion, the Messages Beta program has ended,’ the notice reads. ‘To continue using Messages, please visit the Mac App Store and purchase OS X Mountain Lion.'”
More info and links in the full article here.
Apple’s OS X Mountain Lion drops support for several older Mac models – February 17, 2012