I got some eMacs for cheap and am currently cleaning them up. When I try to run Software Update on them, I get the message that says "Software Update can't find the update server. Make sure you are connected to the internet, then try again." These computers are definitely connected to the internet as I can browse from them. Is it possible that they are looking for an old update server? They're running 10.4.7 and 10.4.8. I've tried deleting the com.apple.SoftwareUpdate.plist file as described here but that didn't work. What do you feel?