Using the Metasploit Framework on Mac OS X
One of the best open source and free pen testing applications available on the Internet today is the Metasploit Project. Metasploit is a very good tool to use to check and see if any services on your network are vulnerable for any one of the numerous publicly available exploits available in the Metasploit Framework. Read more about the usage of the Metasploit Framework at the Macintosh Security blog.
