Following the announcement of the Lync client for Mac availability, Office 365 customers are now able to download it for use with their Office 365 account.
Connect to the download page (https://portal.microsoftonline.com/download/) and go to Step 2 download and install Lync client.
To know more about setting up your Mac client, go to:
- For Enterprise plan http://onlinehelp.microsoft.com/en-us/office365-enterprises/hh180727.aspx
- For Small Business plan http://onlinehelp.microsoft.com/en-us/office365-smallbusinesses/gg192873.aspx
Enjoy 