Problem Many developers run into a persistent “Tunnel connection failed” error when trying to connect an iPad or iPhone for debugging. Even after reconnecting USB-C or Lightning and tapping “Trust This Computer” multiple times, the connection won’t establish. The issue isn’t on the Mac — it’s the iPad not activating its tunneled connection properly. What I discovered The iPad’s Developer Mode networking stack can become unresponsive. By enabling a few developer networking options and running the “Test Responsiveness” function, the system restarts the underlying network daemons and reopens the tunnel instantly. No reboot, no re-pairing, no resets required. Prerequisites iPad with Developer Mode enabled iPad and Mac on the same Wi-Fi network (or paired once via USB for trust) Xcode compatible with your iPad’s iOS version Steps to fix On your iPad, open Settings → Developer. Scroll to Networking and turn on: Network Link Conditioner → On Network Override → On Under the same Networking section, tap Responsiveness
Topic:
Developer Tools & Services
SubTopic:
Xcode