Rand McSam (Rand McNally),
I appreciate your feedback, and it's nice to have a product representative in the discussion. I did have a lengthy conversation with "Chuck" from your tech support group yesterday, and with "Eddie" today. I also had another conversation with AppleCare support and visited a local Apple store today as well (per the direction of AppleCare support).
On another RV forum I did confirm that a member there with the same Rand McNally RVND 7710 product didn't have any compatibility issues with his new "iMac" that also came with OS X Mavericks 10.9.1 installed. Reference source: http://www.rv.net/forum/index.cfm/fu...g/1/page/2.cfm
I had my MacBook Pro (W/Retina) tested today (@ Apple store) and both USB-3 ports are functioning properly.
The conclusion was that Rand McNally's latest MAC Dock software/driver may be compatible with OS X Mavericks 10.9.1, but apparently only with the Apple iMac product. Apple stated that their latest products may have the same OS X Mavericks 10.9.1 and USB-3 ports installed.., but the products don't share the same "build-out" specifications and this may effect the I/O at the USB ports.
It was stated that the Rand McNally MAC Dock software, and/or driver, needs to be updated to meet the compatibility requirements specifically with the MacBook Pro (w/Retina) product. I did contact Rand McNally tech support (Eddie) today with Apple's conclusions, and I was advised that the information would be forwarded to the Rand McNally personal that handle their software and programing.
Rand McSam.., if I can provide any further data, please advise. Also, I assume that you have access to the Rand McNally tech support system, thus having all the detailed history on my compatibility issue.