Das MacBook kommt im Flugzeug-WLAN nicht online, das Telefon schon

Plane Wi-Fi holds all traffic until you sign in on the airline's page. The phone often works because nothing on it hides that page.

Applies to: All current macOS versions. The Off, Fixed and Rotating options for the private Wi-Fi address are in macOS 15 Sequoia and later.Geprüft: 29. Oktober 2026

Symptome

The Mac joins the plane's network, but no sign-in page opens.
Safari shows a security warning or a blank page. The phone signed in with no problems.
The Mac was online, then the airline's page asks you to sign in or pay again.
The airline's page says that your pass is in use on another device.

Mögliche Ursachen

A VPN or iCloud Private Relay. A VPN or Private Relay can stop the plane network from sending you to its sign-in page.
Custom or encrypted DNS. A custom DNS server or a DNS profile does not use the plane's DNS. The network then cannot redirect you to its sign-in page.
A new private Wi-Fi address. The plane network can link a pass to the Wi-Fi address of a device. A new private address makes the Mac look like a new device.
The phone signed in another way. The phone can have signed in through the airline's app, or before the Mac joined. It often has no VPN or DNS profile either.
The airline's own setup. Airlines and their Wi-Fi providers use different sign-in pages and rules. Some show the page only after take-off. Some ask you to use their app.

So prüfst du es

Hold the Option key and click the Wi-Fi icon. Make sure that you are on the airline's network.
Zeige die DNS-Server des WLAN-Dienstes an. Ein eigener Server erscheint hier.
```
networksetup -getdnsservers Wi-Fi
```
Output There aren't any DNS Servers set on Wi-Fi. means that the Mac uses the plane's DNS.
Prüfe, ob ganz oben in der Dienstreihenfolge ein VPN steht.
```
networksetup -listnetworkserviceorder
```
Suche nach DNS-Profilen. Wähle ab macOS 15 Apple-Menü > „Systemeinstellungen“ > „Allgemein“ > „Geräteverwaltung“.
Wähle unter macOS 13 und 14 Apple-Menü > „Systemeinstellungen“ > „Datenschutz & Sicherheit“ > „Profile“.
Choose Apple menu > System Settings > Wi-Fi. Click Details next to the plane's network.
Read the values of Private Wi-Fi address and Limit IP address tracking.

So behebst du es

Turn off the VPN until you are signed in. Also pause its kill switch, if it has one.
If the sign-in page does not appear, forget the network first. Then join it again from the Wi-Fi menu.
Forgetting the network removes its settings. Do it before the next steps, not after.
In the network's Details, turn off Limit IP address tracking. This also turns off Private Relay for that network.
Set Private Wi-Fi address to Fixed before you buy or redeem a pass. Do not change it after that.
If you use custom DNS, remove it for a short time.
```
sudo networksetup -setdnsservers Wi-Fi empty
```
Erfordert ein Administratorpasswort.
If a DNS profile is installed, remove it for the flight. Install it again after you land.
Öffne im Browser eine Seite mit http, nicht https. Öffne zum Beispiel http://captive.apple.com.
Sign in, or buy or redeem the pass, on the airline's page. Use the address only if the airline gives it.
If the pass is in use on the phone, log out there first, if the airline's page allows it.
After you sign in, turn on the VPN, Private Relay and your DNS again.

Mit Kilobat

Check for a sign-in page with Kilobat's diagnosis.
```
kilobat diagnose --json
```
Ausgabe measurements.captivePortal ist true, wenn das Netzwerk eine Anmeldung verlangt.
Show the address of the sign-in page that the network sent Kilobat's check to.
```
kilobat portal
```
Output When a sign-in page is in the way, it prints its address. kilobat portal open opens it in your browser.
Wenn du DNS mit Kilobat eingestellt hast, wechsle für die Anmeldung zurück zum DNS des Netzwerks.
```
kilobat dns automatic
```
Das Ändern von DNS erfordert ein Administratorpasswort.
For the provider, the price and how to connect on your airline, see In-flight Wi-Fi by airline.

Fragen

Why does my phone work when the Mac does not?

The phone often signed in first, or through the airline's app. It also often has no VPN, custom DNS or DNS profile.

What is the address of my airline's sign-in page?

It differs by airline and Wi-Fi provider. Use the address only when the airline publishes it. Otherwise open http://captive.apple.com.

Kann ich ein VPN im Flugzeug-WLAN nutzen?

Turn it on only after you sign in. Airline rules for VPNs differ, and many airlines do not publish one.

Why do I have to pay again after I changed a setting?

The network can link the pass to the Wi-Fi address. A new private address or a forgotten network can look like a new device.

Quellen

Geprüft am 29. Oktober 2026.