Bought a HP Laserjet Pro 8500 A909g. I have installed software but driver never appears in list so there is an option to manually select it. Sometimes the printer then appears and other times it doesn't. Message then appears: If your device is not listed it is not supported by this installer. Downloaded installer again from HP but still no good. Printer is wireless but was given USB cable to connect to Macbook Pro as don't have internet at home and was told it would be no problem. Message now appearing saying if USB port on printer is at front (mine is) do not connect to USB on Macbook. However, it doesn't bother to tell me how to connect it any other way. Nothing in manual. Running out of patience. Just starting working for myself and have clients waiting for designs which I can't even print off. Help me pleeeeassseeee!!!!