YES! Your trusty old HP Laserjet 4MV will work with Snow Leopard.
If you are lucky enough to have a HP Laserjet 4MV postscript printer, you won’t want to lose it just because your Mac OS 10.5.6 machine won’t talk to it. Appletalk goes away in Snow Leopard, so you have to reconfigure your printer to connect via an IP address.
Snow Leopard comes with the printer driver for the HP Laserjet 4B/4MV Postscript, so you can set up your printer to use it when you are adding your printer in the System Preferences>Print & Fax pane.
Here are the instructions that worked for me, found online at <this page>. It’s the answer given by Witczaker.
My situation was slightly different, but by reading your post I figured it out. My MacPro is connected to a wireless router supplied by our Phone company, after upgrading to Snow Leopard, I lost my connection to my HP 4MV which has been my workhorse for years. I tried changing the IP address on the printer as you suggested, but even though the Printer setup would add the printer to my list of printers, when I tried to print, the MacPro could not communicate with the HP 4MV. Eventually, here is how I solved it. I went to “About this mac/More info” menu selected Network/Ethernet1, which is the port I have the cable from the wireless router coming into. This showed me the address of my MacPro, the address of the Router, and the Subnet Mask.
Now I went back to the MIO settings menu on the HP 4MV and made the IP (IP Byte) address similar to the address of my MacPro keeping all the numbers and dots the same as the MacPro but changing the last number to something different (201). Then I made sure the Subnet Mask numbers (SM Byte) on the 4MV were identical to the ones I saw on the MacPro. Then in the Gateway settings (GW Byte) in the MIO menu I put in the Router numbers I got off the MacPro. That did it, I plugged in the IP address in the printer setup “Line Printer Daemon – LPD” and it worked.
On the HP Laserjet 4MV, you change the printer’s settings by setting the printer to “Offline” and pressinf the MENU button until you get to MIO. Then you press the ITEM button to cycle through the MIO choices.
The first thing you set in the MIO menu is CFG NETWORK=YES. It is set to NO when you first see it. You change that to YES by pressing the + button and then the ENTER button to get the change to stick. An asterlsk appears, telling you that the change has happened. NOTE: the CFG NETWORK setting toggles back to NO eacn time you use it. Don’t think that your changes have not taken, when you go back and find the setting has reverted to NO. This is normal. You have to set it to YES each time, so that you can make the other changes.
These instructions helped me with the settings process:
Configure HP Laserjet 4MV to work with Snow Leopard by giving the printer a fixed IP number.
This is how to change the IP Address on the Front panel:
Press ONLINE BUTTON to put printer OFFLINE.
Press MENU until you get MIO MENU
Press ITEM, press + SIGN to get CFG NETWORK=YES
Press ENTER (you get asterisk)
Press ITEM until
Press ENTER (you get asterisk)
Press Item to get BOOTP=NO
Hold Item and press + sign continually until you get to the first IP number desired,
repeat 3 more times for the last 3 IP numbers.
Be sure to press ENTER to have each set of numbers saved.
I used IP No. 192.168.0.20
And Subnet 255.255.255.0
(which is the second set of numbers you enter.
Then go to Mac System Preferences, to the Print & Fax preference pane
Delete any old printer by clicking – minus sign
then Click the + plus sign to add your printer.
In the Protocol I used Line Demon Protocol and typed in the IP number of the router in this case (192.168.0.1)
[Update: I am still using the 4MV with OS X 10.7 Lion. Works just as it did with Snow leopard.]