ArpSpyX is an OS X ARP packet sniffer. It will display a list of IP and MAC addresses found by analyzing arp traffic on your network. Possible uses of ArpSpyX include: Easily gather MAC Addresses of network machines remotely Quickly identify new clients on your wireless network Identify ARP Poisoning attacks by tracking multiple MAC Addresses for a single IP Address What's New: Version 1.1: Added support for an active scanning method that sends arp who-has requests to every IP address on the network of the specified device. Now supports ability to sort the list box by IP or MAC address. Dynamically determines the available network adapters (No longer hard coded based on common device names). Ability to Export IP and MAC address list to a Text File. Defaults to the first usable network adapter with an IP Address instead of defaulting to en0. | 
