Issue: "Unable to connect to VATSIM server" error.
Cause: macOS's firewall or a port conflict.
Solution: EuroScope uses port 6809. Go to System Settings -> Privacy & Security -> Firewall -> Options, and add your Whisky/CrossOver bottle as an exception.
Issue: Controllers hear you, but you hear no one, or vice versa. Cause: macOS microphone permissions do not pass through Wine easily. Solution: Use the AFV (Audio for VATSIM) client separately. Run the AFV Linux/macOS native client in the background, and simply run EuroScope for radar. Never rely on Wine for microphone input. euroscope mac link
The VATSIM community is evolving. While you wait for a perfect EuroScope link, note that SwiftOnDust (the successor to Swift) has a native macOS client. However, many senior controllers refuse to leave EuroScope because of its superior traffic management windows (TMA, LIST, TAG). Issue: "Unable to connect to VATSIM server" error
Thus, maintaining a EuroScope Mac link remains essential for serious controlling. Go to System Settings -> Privacy & Security