I'm not a MAC owner, but I have installed 2 of them recently. The first one a couple of months ago, no problem. The second one is runnning OSX 10.4.4. I connected it to the network and it would not pickup an address. I went down to look at the linksys switch and it was going nuts. I unplugged the MAC and it settled down. The switch is pretty old. I upgraded the to the recent rev level, which is from 2004. The network seems to be running better. The people I installed this for would like to share the new color printer that is connected to the MAC with the windows XP machines on the network. Sharing the printer on the MAC easy, but I can't figure out how to change the workgroup name to make it part of the network. Any help with that would be appreciated. I was really impressed by the new IMAC's, what a really great machine being a windows and cisco tech for all these years.