I am not a Mac Person, but I have one question. Did you press the green button on your LJ1200 to see if it prints a test page? If it does not, then I would assume you have a hardware issue with the printer. If the printer is in ready mode it should have just the one green light on solid. If the printer has all 3 lights on solid, then you need to press the green button and tell us what lights stay on solid with the button pressed so we can tell you what is wrong with the hardware.
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