Ignore that...
Network / Artnet connectivity should still work. However, due to the network library changes, The Catalyst Control window only shows information for network port en0 (compared to any versions prior to m466)
en0 is the first physical network port on a Mac. However, this varies depending on the Mac hardware (MacBook / Mac-Mini / MacPro)
On a MacBook, en0 is the wi-fi adaptor
on a Mac-Mini and MacPro its the Rj45 port
If you are using a Thunderbolt-ethernet or USB to Ethernet adaptor, it will probably appear as en1 on a MacBook
However - the port id doesn't matter - so long as the IP address and Subnet are valid, it should work fine for both Artnet input and output.
m466 works fine in both instances on MacPro 5,1 OS 10.6.8 / 10.8.5 / 10.9.2
and MacPro 6,1 OS 10.9.2
Not vice-versa:
m364 will not work in Mavericks OS 10.9.x
Only m466 will work in Mavericks OS 10.9.x
m466 will also work in OS 10.6.8 / 10.8.5
Simon