MacOS Mojave 10.14.1 Captive Wi-Fi Problem

macosmojaveNetworkwifi

This is the same/similar to this one, but I'm running the final version of 10.14.1. I can make the problem go away if I remove the following files from /Library/Preferences/SystemConfiguration/:

  • com.apple.airport.preferences.plist
  • com.apple.wifi.message-tracer.plist
  • NetworkInterfaces.plist
  • preferences.plist

After a reboot, the captive login window works, but at some point, it stops working again and looks like: captive login window error

I haven't tested much – I don't have regular access to many captive Wi-Fi networks.

I can work around the problem by dismissing the error, closing the window and using Safari to go to https://captive.apple.com, but I would like to solve the problem rather than work around it if possible.

Has anyone figured this out or can anyone point me in the right direction?