Lync for Mac 2011 is Microsoft’s third instant messaging client for Mac preceded by Messenger for Mac and Communicator for Mac. Version 14.0.0 was introduced September 8, 2011, and quickly followed by version 14.0.1 on October 21, 2011.
Unlike Microsoft Messenger for Mac, which is available to everyone as a free download or as part of Office for Mac, Lync for Mac is available only to Office for Mac 2011 volume license and Office 365 customers. It requires Microsoft Lync Server.
Lync for Mac offers features focussing on instant messaging, screen and application sharing, and audio and video conferencing.