ExScan Rigil for macOS still appears to not support the 3DConnexion / NDOF navigation devices. This functionality is built in to the Windows version of the app and works very well. However, the same functionality in the macOS built is either missing from the UI or was not factored in.
The main reason why the Mac version is not compatible with 3D mice is that Apple does not currently provide an SDK similar to that used in Windows; the latest SDK still does not support this feature. Should Apple release an SDK update in the future, we will develop this feature as soon as possible.