Thanks for the notes here on this issue.
I tried the suggestion of : "beta version of SmartPSS here" with no luck. Catalina kept giving me an "unexpected" closing and prompt to "reopen" - but no successful install.
This one installed, https://q-see.s3.amazonaws.com/content/files/software/Q-See-SmartPSS.pkg, and seems to be working. However, after entering the same settings I had on Flir Cloud Client, it says "Offline(Can not find network host)"
Agghh this is frustrating - so close, yet so far. Unfortunately, my cameras are on another house 90 minutes away, so I'm guessing I'll have to go out there and check the Device ID or Client Port (does that sound right?). I'm not using the IP, but rather the Device ID.
DEH