Developer Mode disabled To use … for development, enable Developer Mode in Settings → Privacy & Security. as the reason for an ineligible destination. Mobster says it as Developer Mode is off on your iPhone, and mobster doctor prints the Developer Mode line with a ✗.
Why it happens
iOS refuses to run development builds, including Mobster’s helper, until Developer Mode is on. Mobster never turns it on for you: it’s a switch on the phone.Fix
- On the iPhone, open Settings › Privacy & Security › Developer Mode.
- Turn Developer Mode on. The phone restarts.
- After the restart, unlock the phone and confirm Turn On when it asks.
- Plug the phone in, keep it unlocked and choose Check again in Mobster for Mac, or run
mobster doctor.
Check it worked
mobster doctor prints ✓ Developer Mode on once it’s on.
Checked 26 Oct 2026 against Mobster 0.4.0. Back to Troubleshooting.