I am so happy to inform you that Communicator for MAC 2011 includes now the awesome "desktop sharing feature"! this is a really interesting update to the Communicator for MAC 2011 in addition to all the basic lync client features.
The new feature has been introduced as part of the Communicator for MAC 2011 13.1 "KB2476505" update.
As a reminder and for those who doesn't know that Communicator for MAC is the Lync 2010 Client that runs on MAC OS. and this client is part of the Microsoft office for MAC 2011 suite.
as many of you are wondering where the Lync trial download is, yes it has been moved from some reason from it's original location http://lync.microsoft.com/en-us/TryIt/Pages/try-it.aspx
but you can still get it from Microsoft Technet evaluation Center here
kindly note that you have to be logged in to Microsoft Technet website
This is the Cumulative Update n1 For Lync Server, Client and devices
Lync Server 2010 Hotfix KB 2493736
Lync 2010 Hotfix KB 2467763 (64 bit)
Lync 2010 Hotfix KB 2467763 (32 bit)
Lync 2010 Attendee Hotfix KB 2467760
Lync 2010 Attendee Hotfix KB 2467762 (Admin level install)
Lync 2010 Attendee Hotfix KB 2467762 (User level install)
Lync 2010 Phone Edition for Polycom CX700 and LG-Nortel IP Phone 8540
Lync 2010 Phone Edition for Polycom CX500, Polycom CX600 and Polycom CX3000
Lync 2010 Phone Edition for Aastra 6721ip and Aastra 6725ip
Lync 2010 Group Chat Hotfix KB 2467765
Lync 2010 Group Chat Admin Tool Hotfix KB 2467764