--- title: "MacBook won't connect to airplane Wi-Fi but iPhone does: fix it · Kilobat Guides" url: "https://kilobat.app/ja/guides/airline-wifi-mac" description: "The Mac joins the plane's Wi-Fi, but nothing loads while your phone works. Clear the VPN, DNS and private address settings that hide the sign-in page." --- # MacBookは機内Wi-Fiでネットに出られないが、電話はできる 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. · 確認日：2026年10月29日 ## 症状 - 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. ## 考えられる原因 - **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. ## 確認方法 1. Hold the Option key and click the Wi-Fi icon. Make sure that you are on the airline's network. 2. Wi-FiサービスのDNSサーバを表示します。カスタムサーバを設定していれば、ここに表示されます。 ``` networksetup -getdnsservers Wi-Fi ``` Output `There aren't any DNS Servers set on Wi-Fi.` means that the Mac uses the plane's DNS. 3. サービスの順序の先頭にVPNがないか確認します。 ``` networksetup -listnetworkserviceorder ``` 4. DNSプロファイルがないか確認します。macOS 15以降では、アップルメニュー>「システム設定」>「一般」>「デバイス管理」を選択します。 5. macOS 13と14では、アップルメニュー>「システム設定」>「プライバシーとセキュリティ」>「プロファイル」を選択します。 6. Choose Apple menu > System Settings > Wi-Fi. Click Details next to the plane's network. 7. Read the values of Private Wi-Fi address and Limit IP address tracking. ## 解決方法 1. Turn off the VPN until you are signed in. Also pause its kill switch, if it has one. 2. If the sign-in page does not appear, forget the network first. Then join it again from the Wi-Fi menu. 3. Forgetting the network removes its settings. Do it before the next steps, not after. 4. In the network's Details, turn off Limit IP address tracking. This also turns off Private Relay for that network. 5. Set Private Wi-Fi address to Fixed before you buy or redeem a pass. Do not change it after that. 6. If you use custom DNS, remove it for a short time. ``` sudo networksetup -setdnsservers Wi-Fi empty ``` 管理者パスワードが必要です。 7. If a DNS profile is installed, remove it for the flight. Install it again after you land. 8. ブラウザで、httpsではなくhttpのページを開きます。たとえばhttp://captive.apple.comを開きます。 9. Sign in, or buy or redeem the pass, on the airline's page. Use the address only if the airline gives it. 10. If the pass is in use on the phone, log out there first, if the airline's page allows it. 11. After you sign in, turn on the VPN, Private Relay and your DNS again. ## Kilobatを使う場合 1. Check for a sign-in page with Kilobat's diagnosis. ``` kilobat diagnose --json ``` 出力ネットワークがサインインを求めているとき、`measurements.captivePortal`は`true`になります。 2. 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. 3. KilobatでDNSを設定している場合は、サインインの間はネットワークのDNSに戻します。 ``` kilobat dns automatic ``` 4. DNSの変更には管理者パスワードが必要です。 5. For the provider, the price and how to connect on your airline, see [In-flight Wi-Fi by airline](https://kilobat.app/ja/in-flight-wifi). ## よくある質問 **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. **機内Wi-FiでVPNを使えますか？** 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. ## 出典 - [Apple Developer News：How to modernize your captive network（2020年6月22日）](https://developer.apple.com/news/?id=q78sq5rv) - [Appleサポート：AppleデバイスでプライベートWi-Fiアドレスを使用する](https://support.apple.com/en-us/102509) - [Appleサポート：特定のWebサイト、ネットワーク、システム設定でiCloudプライベートリレーを管理する](https://support.apple.com/en-us/102022) - [Appleサポート：MacでDNS設定を変更する](https://support.apple.com/guide/mac-help/change-dns-settings-on-mac-mh14127/mac) - [Appleサポート：MacがWi-Fi経由でインターネットに接続されない場合](https://support.apple.com/en-us/101588) - networksetup(8)、macOS 27.2に付属のmanページ 2026年10月29日に確認。 ## 関連ガイド - [MacでWi-Fiのログインページが表示されない](https://kilobat.app/ja/guides/captive-portal-not-appearing): 公衆ネットワークの多くは、ログインページでサインインするまですべての通信を止めています。 - [MacのプライベートWi-Fiアドレス](https://kilobat.app/ja/guides/private-wifi-address): プライベートWi-Fiアドレスは、ネットワーク上でMacのハードウェアMACアドレスの代わりに使われます。 - [iCloudプライベートリレーで一部のWebサイトが正しく動かない](https://kilobat.app/ja/guides/icloud-private-relay-sites): iCloudプライベートリレーは、Safariの通信を2つのリレーに通します。 - [Macで暗号化DNSを使う](https://kilobat.app/ja/guides/encrypted-dns-mac): 通常のDNSクエリは暗号化されていません。 - [MacでIPアドレスのトラッキングを制限する](https://kilobat.app/ja/guides/limit-ip-address-tracking): 「IPアドレスのトラッキングを制限」は、ネットワークごとの設定です。 - [MacがWi-Fiにつながっているのにインターネットに接続できない](https://kilobat.app/ja/guides/wifi-connected-no-internet): Wi-Fi接続は、ルーターまでのリンクにすぎません。