Xamarin iOS MT1007 Failed to Launch the Application
After going through the free provisioning profile article I’ve been able to debug my Xamarin iOS app on a physical device. I wanted to verify what happens when the application gets installed for the first time, so I deleted the app from my phone. After running the Visual Studio debugger, the application was reinstalled successfully on my device, but failed to launch the debugger with the following message in the output log:
The app could not be launched on ‘iPhone’. Error: error MT1007: Failed to launch the application ‘/path/to/my/iOS.app’ on the device ‘iPhone’: Failed to launch the application ‘My.App.Namespace’ on the device ‘iPhone’: ESecurity. You can still launch the application manually by tapping on it.
Resolve the Xamarin iOS MT1007 Failed to Launch Error
The message sent to the Visual Studio output log was fairly vague. A quick Google search brought me to several different posts suggesting things like restarting my phone, updating Xcode and so on. Restarting wasn’t the solution and Xcode was already up-to-date.
Enabling the Device Log prior to debugging gave me a bit more insight: after the error was raised, the following was output to the device log:
The request was denied by service delegate (SBMainWorkspace) for reason: Security (“Unable to launch my.application.namespace because it has an invalid code signature, inadequate entitlements or its profile has not been explicitly trusted by the user”).
The line “its profile has not been explicitly trusted by the user” caught my interest, and made me believe something relate to my provisioning profile was undone. I plugged my phone into the Mac and opened my provisioning profile Xcode project. I then selected my device as the target and ran the application, which greeted me with an error message stating that my device does not trust the developer profile associated with the app.
You Just Need a Little Trust
While the Xamarin iOS MT1007 error can mean many things, in this case it boils down to trust. The solution to this trust issue is the following:
- On your iPhone, navigate to
Settings->General->Device Management. - Within
Device Management, you should see your developer provisioning profile, click it. - Trust the developer profile.
After trusting the profile you’ll see a callout stating:
Apps from developer “Your Profile” are trusted on this iPhone and will be trusted until all apps from the developer are deleted.”
Those last few words sum it all up. The problem was introduced the moment I uninstalled the app from my device, and rightfully so according to the relationship my device has with the developer profile.
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2 Replies to “Xamarin iOS MT1007 Failed to Launch the Application”
In ref to Xamarin what is my provisioning profile Xcode project?
At the top of the post I link to a tutorial that outlines setting up a “provisioning profile”, which enables you to run your app on a physical device without being a part of the Apple Developer Program. Your provisioning profile xcode project would be in reference to the project you created as part of that tutorial.