Problem: You have an HP Laserjet 5L (or 6L) printer and want to print to it with your USB adapter.
Problem: The Printer Setup Utility only shows "USB" under the connection heading. You highlight the line and manually select your printer but when you click "Add" nothing happens.

Solution: Follow these directions gleaned from these two webpages and you should be up and running.

This webpage lays out how to manually setup your printer. The problem is, it assumes the URI is filled in correctly. Despite many machinations I could not get it to display (and you either if you've ended up here).

This webpage describes how to obtain the info needed in the URI line.

Note, I'm using a Belkin USB to parallel printer adapter. I've used this same adapter with other OSX systems and parallel printers and it just worked. Not sure why it's different with this printer (if that's the problem).

Here are my instructions adapted from these two pages:

• Connect the printer to your Macintosh with the USB to parallel adapter.
  
• Make sure the printer is on an not in stand-by. Make sure no other printers are turned on or connected.
  
• Restart the computer (this may not be necessary if you see similar information in the following step).
  
• Open up a Terminal window and type the following:

  lpinfo -v

  You should see a line similar to this:

  direct usb://Unknown/Unknown?serial=0

  This will most likely be your device URI.
  

• Go to Printer Setup Utility
  
• Click Add (Option click should not be necessary).
  
• Option Click "More Printers"
  
• In the printer browser window select "Advanced" (top of the two drop down menus in that window)
  
• Select Device "USB-Printer"
  
• Type in the name of your printer, if you'd like.
  
• For the Device URI copy and paste the line lpinfo -v provided. In my case I copied "usb://Unknown/Unknown?serial=0" leaving the "direct" portion of the output from lpinfo off (and of course, no quotes).
  
• Select Printer Model HP
  
• Select the appropriate driver. There is some discussion about the output quality of various drivers depending on the amount of memory in the printer. It seems that the driver for the 4L is supposed to have better output. I'll leave this as an exercise to you.
  
• Enjoy!