I succeeded in installing the FoCal 1.7 Beta on my Mac Book Pro, and was able to do most of the tests provided by the FoCal Application. I did not do all of the tests because of time but was able to get results on my D800 using the 24-70mm f/2.8 Nikkor lens. The test I did were: Fully Automatic, Aperture Sharpness, AF Consistency, and Multi-Point Focus (using 51 sensors). I used ISO 1600 for most tests, and printed all the reports but have not analyzed them.
Choose: Intel Mac: Runtime to download the Don framework DMG and install it.
Then install FoCal 1.7. The files from the installation have to be copied into into a folder and then added to the Mac's Applications.
FoCal Use. To use FoCal 1.7 you must pick the camera either Canon or Nikon by: FoCal>Preferences>General then go to the last line, Active Camera Support, and chose Nikon. Once you pick Nikon, when you start FoCal, the panel of Figure 1 appears. You have to remove the memory cards from the camera because, with the cards are removed it is faster to Find and Connect the camera. Figure 2, because it shows the found camera, Find and Connect changes to Disconnect. Figure 2 is the portal of all the FoCal tools, which is a step up from 1.6.