Installing Ettercap-ng on OSX steps.
1: Visit http://www.macports.org/install.php
2: Download the dmg that matches your OS Version.
3: Once downloaded, Install
4: Open a Terminal and type: "sudo port install ettercap-ng"
5: It will prompt for a password cause of "sudo", enter in your password

	Installation will take approx 10 min's give or take a minute, Once install is complete
it will return to your terminal. 

6: Type "sudo ettercap -C -i (INTERFACE)"
	
	For Example, I have a Mac Mini, I got the Interface information from "IFCONFIG", it listed
the interface that I use on the network as "en1", so I typed "sudo ettercap -C -i en1", after that
everything was peachy!