If at all possible, I would never print over a wireless network. Too many things to go wrong. My expectation would be that it would not work reliably to begin with. Go with wires.
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I've been doing it for years. Never a problem. What is there to go wrong?
Well, I opted for the drooping ethernet cable-
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So you have a drooping ethernet cable going to the airport? Does it droop worse than the USB cable you were using? Guess I can't see why there would be any difference in which type of cable you are using.
That's weird, all iPF printers connected via ethernet should show up via Bonjour without any additional headaches.
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That has been my experience as well. Install the driver, plug in the printer, and then create a printer queue on the Mac. My network has a DHCP server, I assume the printer is assigned an address. Setting up a manual IP address shouldn't matter, should still show up. (sorry I know that isn't much help to the OP).