You can find the complete ClamAV® Unofficial Signature Update System's OSX Installer. The system is based upon Bill Landry's script converted and tailored to Mac OSX. Also available here are support applications, socat and GnuPG, as well as a description of winnow Unofficial signatures and support contact information for OITC.
OSX Installer and associated scripts and support files brought to you by OITC
ClamAV Unofficial Signature Update script brought to you by Bill Landry
Unofficial signatures brought to you by their respective authors: Sanesecurity, Bill Landry, OITC, MSRBL, SecuriteInfo, and MalwarePatrol
ClamAV brought to you by the ClamAV Open Source Development Community and SOURCEfire
ClamAV and the ClamAV logo are registered trademarks of Sourcefire, Inc.
OSX Installer and scripts. ©2008-2009 by TR Shaw & OITC All rights Reserved, USA and Worldwide