Apple is officially making Messages for OS X a Mountain Lion only feature. On Friday, the company sent out emails to its customers that they would be discontinuing the Messages Beta program for Lion on December 14th, 2012. The Messages Beta program allowed users of OS X Lion to download and try out Messages on their Macs, syncing all iMessages on the user’s iPhone, iPad, and iPod Touch to their Mac.
The Messages Beta program for Lion will end on Friday, December 14, 2012. We hope you’ve enjoyed the opportunity to preview Messages.
If you’d like to continue using Messages, upgrade to OS X Mountain Lion from the Mac App Store. Messages is one of many great new apps and features built right into OS X Mountain Lion. Learn More.
Thank you for your participation in the Messages Beta program.
The email notes that current users of Mac OS X Lion that are looking to continue using iMessages on their Mac must upgrade to OS X Mountain Lion which is available for $19.99 on the Mac App Store [Direct Link]. It is possible that some users will be unable to upgrade to Mountain Lion because of hardware requirements that the software requires.
Apple launched iMessages earlier this year as a replacement for iChat, which also had the ability to run third party chat clients such as AIM and Google Chat. iMessages after December 14th will be strictly for Mountain Lion and future OS X updates, as well as the for the iPhone, iPod Touch, and iPad.