The Cisco Unified Personal Communicator will support for the Mac Leopard operating systems as well as Windows. It offers voice, video, instant messaging, Web conferencing, voice mail, and presence information, and integrates with the broader Cisco enterprise communications platform.
According to Acosta's post, Cisco also supports SSL and IPSec VPN clients for the Mac OS, Apple supports Cisco's EAP-FAST wireless security protocol natively on the OS X.