I upgraded my OS to Mac OS Sierra a few days ago. Have been challenged at every startup since upgrading whether to allow incoming traffic from my scanner and whether to allow operation from its control panel. Responses are not kept. Same question next startup.
Chat session this morning with Norton ended with recommendation to uninstall and reinstall Norton Security which I have now completed. I'm now on Norton for Mac 7.4.
Same problem at startup; still challenged about my scanner. How do I know what Norton thinks is in my local network, if anything, and how do I add this scanner? The instructions I found a few minutes ago claim to be for current Norton products, but the steps do not match with my Norton.