How do I get new Mac Pro to "find" my HP LaserJet 1200n?

You should be able to add this printer as a JetDirect printer. I do not know whether it supports Bonjour, but if it does not, your best bet is to configure the printer with a fixed address within the network subnet. That is, if the router address is xxx.yyy.zzz.0, then configure the printer with an address like xxx.yyy.zzz.30, where the letters are the same numbers in both addresses. Then add the printer using the JetDirect protocol and that address.

If I could pile into this thread. I have the exact same situation with my new iMac 10.6.5, my G5 and a Laserjet 2100M with an ethernet port. I have sent the G5 to the recycler. I also had the @G5 message when the G5 was connected. Now it's gone, so I deleted that printer from the iMac.

My iMac hooks to a Linksys router as does the printer. I've read the Apple posts about entering IP manually, but I only know the routers IP address, not the printer itself.

How do I configure the printer with a fixed address within the network subnet. I rummaged around in the Linksys and can't figure out how to ask it to ping its ports or tell me how to id a port.

ping is an endpoint to endpoint query protocol - the router only passes the messages through...

You should be able to find the printer's current IP address with this help:
http://h30434.www3.hp.com/t5/Printer-networking-and-wireless/LaserJet-1200-IP-Ad dress/td-p/14764

yes. after I posted, I found an HP post about holding down the two buttons and getting a printout where the printer self identifies its IP address. It's done no good. I can add the printer manually via the IP tab) and Print Utility just says it can't connect to the printer when I try to print. I haven't been able to do the thousand monkeys typing thing by plugging the printer directly into the iMac ethernet port. Nothing I've tried works. I wish I could instruct the router to tell me what IP addresses are assigned. I suppose x.x.x.100 and 101 (iMac wireless and the printer wired)? It seems criminal to throw out a perfect ok laserjet printer.

If you add the printer, you need to choose HP JetDirect to add the IP address, not the default IP address method. The HP address uses a different port. If you do that, and the first three numbers of the printer address are the same as the router address, it should work.

Good news and bad news.

Good news: I got it to work
Bad news: It worked after about 4-1/2 hours of reading Apple and HP posts and printer manuals, and I really don't know that I did anything different I didn't do at 20 min.

To document for anyone that might search...

With a Laserjet 2100M or 2100TN connected through a Linksys router, I think what was key is to unplug and restart every network device several times, including the router itself. That's the only thing I can think of that might have made it work this time since I was doing the random monkey thing.

Pushing both buttons simultaneously on the printer gets it to divulge its IP address, but I realized I can look at my router in the browser and see where it starts assigning IP addresses (...100 in my case) and if worse came to worse, just configure a bunch of printers with ...100, ...101, etc up to the number of devices on the network since you don't know what got assigned what address (it's unrelated to which of the four ports a device is plugged into because of the wireless devices).

So you can go to the printer menu, I right click on the existing printers and clear all the printers, then hit + and then go to IP menu and pick the jetsocket choice, type in the IP address. The very last (successful) time, it knew what the printer was and picked the drivers (instead of generic postscript or PCL like it had 50 times before).

Again, I think it's the rebooting and unplugging or turning things off to force them to do a little comms handshaking. Depression to elation, all over a printer. We're just pawns in the grip of multinational hegemony. <joke>

Message was edited by: J Darrel Stickler

I had a similar problem with our iMac network. After an hour and a half of fiddling and checking, here's what I did:
1. Get the "Configuration" page from the 1200n, which I did by pushing the tiny button on the printer's wireless router.
2. Check the IP address. Strangely, mine had shifted from xx.xx.xx.6 to xx.xx.xx.7, which may have been the problem.
3. Open System Preferences/Print & Fax and press "+" to add a printer.
4. Select "HP Jetdirect - Socket"
5. Enter the IP address in "Address"
6. Wait for it to find a driver - it should be "HP LaserJet 1200".
7. Select the "Add" button. You're good to go - or at least we were!