Review a summary of software requirements for Lync 2013.
Microsoft Windows 7 and 8, together with IE 7 through 10 and Mozilla Firefox, and integrated with Office 2010 and 2013 are required in support of the Lync 2013 client.
Lync 2013 is available only for Windows. However, Lync Server
2013 supports the following clients on computers that are running
Mac OS 10.5.8 or latest service pack or release (Intel-based)
operating systems. For details about supported features, see Client
Comparison Tables and follow column for Lync for Mac
Lync Web App supports specific combinations of operating systems
and browsers. Read more.