--- title: "Train Wi-Fi slow on Mac: test it, save data or use your hotspot · Kilobat Guides" url: "https://kilobat.app/de/guides/train-wifi-mac" description: "Train Wi-Fi is shared by many passengers and drops along the route. Test it, get more from it, and know when your phone's hotspot is the better choice." --- # Zug-WLAN auf dem Mac: nutzbar machen oder auf den eigenen Hotspot wechseln Train Wi-Fi usually reaches the internet over mobile networks along the track. All the passengers share that connection, so it is often slow. Applies to: All current macOS versions. Instant Hotspot needs an iPhone or a cellular iPad with the same Apple Account as the Mac. · Geprüft: 29. Oktober 2026 ## Symptome - The Mac joins and signs in, but pages load slowly or not at all. - Calls freeze and uploads stop. - The connection drops in tunnels and between stations, then comes back. - The sign-in page appears again after some time. ## Mögliche Ursachen - **A shared connection.** The train's connection serves all its passengers. A full train leaves little speed for each device. - **Gaps in mobile coverage.** Tunnels, cuttings and rural areas interrupt the mobile networks that the train uses. - **Limits from the operator.** Some operators limit the speed, the data or the time for each device. Some block streaming. - **The sign-in, a VPN or custom DNS.** Train Wi-Fi often has a sign-in page. A VPN or custom DNS can hide it, as on other public networks. - **Background data on the Mac.** Sync, backups and updates use the same small connection as your work. ## So prüfst du es 1. In a browser, open http://captive.apple.com. If the operator's page opens, sign in. 2. Run Apple's speed test. Write down the result. ``` networkQuality ``` 3. Sieh, welche Prozesse gerade das Netzwerk nutzen. Drück q zum Beenden. ``` nettop -P -d ``` 4. Look at the mobile signal on your phone. Strong signal and few passengers can make the hotspot faster. ## So behebst du es 1. Turn on Low Data Mode for the train network. Choose Apple menu > System Settings > Wi-Fi. 2. Click Details next to the train network. Turn on Low data mode. Click OK. 3. Pause sync, backups and updates until you are on a better network. 4. In calls, turn off your camera. Audio uses much less of the connection. 5. If the train Wi-Fi is too slow, click the Wi-Fi icon. Choose your iPhone under Personal Hotspot. 6. Run the same speed test on the hotspot. Keep the faster of the two. 7. To stop the Mac from going back to the train Wi-Fi, open its Details. Turn off Automatically join this network. 8. On the hotspot, pause the apps that use data in the background. See [Mac uses Personal Hotspot data in the background](https://kilobat.app/de/guides/hotspot-background-data). 9. In tunnels and remote areas, the hotspot can drop too. Save your work before them. ## Mit Kilobat 1. Find which part is slow: Wi-Fi, the router, the internet, DNS or the sign-in page. ``` kilobat diagnose ``` 2. Check the sign-in page, and whether the network logged you out after an earlier sign-in. ``` kilobat portal ``` 3. Test the speed with a limit on the data that the test uses. ``` kilobat speedtest --budget-mb 10 ``` 4. Sieh Upload und Download jeder App live. Drück q zum Beenden. ``` kilobat status --watch ``` 5. Mark the train network as metered. Kilobat then treats it like a hotspot. ``` kilobat networks cost metered ``` 6. For travel data packs, see [Working from anywhere with a Mac: eSIMs, phone hotspots and making data last](https://kilobat.app/de/guides/work-from-anywhere-mac-mobile-data). ## Fragen **Is train Wi-Fi or my hotspot faster?** It depends on the route, the time and your carrier. Test both with the same test, then keep the faster one. **Does train Wi-Fi use my phone's data?** No. Train Wi-Fi does not use your data plan. The Personal Hotspot does. **Is train Wi-Fi safe for work?** Pages with https hide their contents from the network. Turn on a VPN after you sign in, if your work needs one. ## Quellen - [Apple Developer News: How to modernize your captive network (22. Juni 2020)](https://developer.apple.com/news/?id=q78sq5rv) - [Apple Support: WLAN-Einstellungen auf dem Mac](https://support.apple.com/guide/mac-help/wi-fi-settings-on-mac-mh11935/mac) - [Apple Support: Mit Persönlichem Hotspot eines iPhone oder iPad verbinden](https://support.apple.com/en-us/111785) - [Apple Support: Mit Instant Hotspot eine Verbindung zu deinem Persönlichen Hotspot herstellen](https://support.apple.com/en-us/109321) - [Apple Developer: NWPath isExpensive](https://developer.apple.com/documentation/network/nwpath/isexpensive) - networkQuality(8) and nettop(1), man page installed with macOS 27.2 Geprüft am 29. Oktober 2026. ## Verwandte Anleitungen - [Mac verbraucht im Hintergrund Daten über den Persönlichen Hotspot](https://kilobat.app/de/guides/hotspot-background-data): Ein Mac an einem Telefon-Hotspot kann viele Daten verbrauchen, ohne dass du etwas tust. - [iPhone-Hotspot erscheint nicht auf dem Mac](https://kilobat.app/de/guides/instant-hotspot-not-showing): Mit Instant Hotspot verbindet sich ein Mac ohne Passwort mit dem Hotspot deines iPhone oder iPad. - [Mit dem Mac überall arbeiten: eSIMs, Telefon-Hotspots und Daten sparen](https://kilobat.app/de/guides/work-from-anywhere-mac-mobile-data): Ein Mac mit mobilen Daten kann ein Reisedatenpaket in wenigen Tagen aufbrauchen. - [Netzwerk auf dem Mac als begrenzt behandeln](https://kilobat.app/de/guides/metered-network-mac): macOS markiert manche Verbindungen als teuer, etwa den Persönlichen Hotspot eines iPhone. - [Datensparmodus auf dem Mac verwenden](https://kilobat.app/de/guides/low-data-mode-mac): Der Datensparmodus weist macOS und Apps an, in einem WLAN weniger Daten zu verbrauchen. - [WLAN-Anmeldeseite erscheint auf dem Mac nicht](https://kilobat.app/de/guides/captive-portal-not-appearing): Öffentliche Netzwerke halten oft den gesamten Datenverkehr zurück, bis du dich auf einer Anmeldeseite anmeldest. - [Videoanrufe ruckeln oder frieren auf dem Mac ein](https://kilobat.app/de/guides/video-call-stutter-mac): Anrufe brauchen eher eine stabile Latenz und einen stabilen Upload als hohes Tempo.