With the release of the 10.0.17763.4088 OS update, the Xbox One will now only allow game streaming connections to be established by other devices within the same local network as the console itself. This means that unfortunately it is no longer possible to connect to your Xbox One over the internet with OneCast. Accordingly we have removed the internet play feature from the macOS version of OneCast and released the v1.11 update which incorporates this change.

This will also affect any users of the iOS version of OneCast who have been playing over the internet via the unsupported method of performing manual port forwarding/DMZ and then entering their public IP into the “Manual network host” setting field.