Owners of OS X Lion that the b lwa ta of Apples chat client, Messages have ge lwa installed, from 14 december. Is the b lwa ta, and only on Macs with Mountain Lion is the service to achieve.
The Messages-software for the desktop is both the successor of chat client iChat as a service that allows OS X users can communicate with each other and with users of iOS. On the iPhone, the service is more or less a replacement of sms: if iOS recognizes that a conversatiegenoot also on iOS, message is not about sms sent via Messages.