Catalyst/PixelMAD question

[efxmaster]

I don't actually have any sort of hub or switch in line between the computer and the Artnet box. I just plugged one to the other. I usually always use a switch to do things, but since I was only using one Artnet box, I just plugged it in. Could that be the problem, that I am not using any sort of network device in between the MAC and the Artnet box?

[Marty Postma]

Are you using a crossover cable or a "regular" network cable?
Direct device-to-device should always use a crossover cable.
Hope this helps.