When I launch a test against the iOS simulator I get this system alert:
Do you want the application "WebDriverAgentRunner-Runner.app" to accept incoming netwoek connections?
It has to be closed manually. I can't figure a way to keep this alert from appearing, other than turning off the firewall. The suggested fix is to go to system firewall settings and allow the app to accept connections, but no such app even exists on my system.
Turns out it exists on my system, but despite the .app extension it does not live in Applications, which is where the firewall settings add function looks for apps