flitedocnm wrote:but upgrade the MacBook Pro to High Sierra 10.13.2, I'm guessing that wouldn't pose a risk to connecting to Indigo from the Indigo client on the MacBook, since the USB connection from the PowerLinc goes to the Mac mini running Sierra, not to the MacBook. Am I correct?
This is exactly what I'm doing with clients. I have zero issues with 10.13.x as a client connecting to my server running 10.12.x