I have a swift app which I'm running via a LaunchAgent. It sends a video feed via multicast UDP. While it works if I manually allow via Privacy & Security - Local Network (allowing the app to find devices on local network), I cannot get AllowedEthernetLocalNetworkAddresses to work. I have attempted to do so with my app and with ffmpeg (installed via homebrew). Neither seems to respect the AllowedEthernetLocalNetworkAddresses setting outlined in TN3179: Understanding local network privacy | Apple Developer Documentation. I have attempted allowing 239.0.0.0/8, 224.0.0.0/4, 239.255.0.0/16, 239.255.1.1/32. I see no change after a reboot with any of these values in the array: sudo defaults write com.apple.network.local-network AllowedEthernetLocalNetworkAddresses -array "239.0.0.0/8" This is on macOS 26.5.1, and I am only connected via ethernet. Am I missing a configuration piece? Thanks!