Can anyone help? I have the above new Imac and also a PC in another room. I have a Lexmark All in One X9575 Printer which works well with my PC on Wi Fi connection. I ran the latest Drivers for the printer on my Mac, but although it finds the printer via Wi Fi, when I try to print from my Mac after I have used it on the PC it doesn't find the printer. I wonder if it is not possible to share PC and Mac on that printer, as there seems to be some kind of issue. I have no problem if I use a cable on the Mac with it instead, but this is of course no use as I need it to share with the PC. Any answers greatly appreciated.