Help, iMac/EOSNomad not connecting to EOS/ION


EOS Nomad on my iMac isn't reading the "Router" (aka Default Gateway) from my Mac and therefore can't seem to find or connect to our Ion console? Works okay on a PC through the same router. What am I missing? I has worked in the past (though that was probably pre-pandemic and I don't know what's changed other than upgrade Ion to 3.0+). Both are Mac and Ion are running (and Mac is on 10.13.6 High Sierra). Thanks for any suggestions....