So I've been trying to update my M2D2's And am having no luck .Downloaded and put to the root of a sdcard . Put SXM2D2 in service mode plugged in card reader with updated firmware and nothing will come up. Try'd and try'd everything i Know and still nothing .One is V1.3 And the Other is V.4 . They all Work fine just can't seem to update them . I'm Using a Macbook pro which is current on it's version .Help?