Thank you very much for your comment and point of view. Since I posted my question I spoke with my camera dealer and a number of frIends in our Nikonians group here in Vancouver. All appear to be in agreement that this was put into the documentation in error. My D300 has the ability to be connected to my Mac computer or PC as a mass storage device. I had thought of that before asking the question but did not understand the use of the "MTP/PTP" designation which totally threw me off.
Again, thanks very much. I guess this was a bit of a red herring.