MAC Java 1.6 is required. Use "Software Update" to install all Java and Mac system updates. Use the command `java -version` to make sure you have version 1.6. Note: you must do this Terminal command each time you restart your mac: sudo chmod 777 /dev/bpf* + + + WINDOWS Java 1.6 is required. Use the command `java -version` to make sure you have version 1.6. Winpcap (www.winpcap.org) is required. + + + Linux We've done almost no testing but should work in theory! yer on yer own ;)