Xcode process launch failed: Security

 

I have been developing an app for 1 or 2 weeks now and just yesterday I have updated my iPhone 5S to the iOS 8 GM. Everything worked fine and I could test on my device as well until I deleted the app from my phone and wanted to build again. The following error appeared: 

Could not launch "My App"
process launch failed: Security

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When I test with the simulator it works fine. Is this because of the iOS 8 GM update and how can I fix this launch problem? I want to be able to test on my iPhone and in the simulator.

If you get this, the app has installed on your device. You have to tap the icon. It will ask you if you really want to run it. Say “ yes ” and then Build & Run again .

As from iOS 9, it is required to go to Settings → General → DeviceManagement → DeveloperApp → Trust .

Updated answer for Xcode 7 : Tapping the app no longer works (as of beta 1 it just displays an "untrusted enterprise developer" message with only a Dismiss button).

To fix, open the Settings app, go to General / Profiles, and you'll see your profile. Mark it trusted and things should start working normally again.

Updated For iOS 9.2.1 and Xcode 7.2.1:

Goto: Settings > General > Device Management > Select App from Developer Apps > Trust App.

Hey so the accepted answer works, except if you need to debug the initial launch of the app. However I think that answer is more of a work around, and not an actual solution. From my understanding this message occurs when you have some weirdness in your provisioning profile / cert setup so make extra sure everything is in tip-top shape in that dept. before ramming your head against the wall repeatedly.

What worked for me was as follows from the apple docs:

Provisioning Profiles Known Issue If you have upgraded to the GM seed from other betas you may see your apps crashing due to provisioning profile issues.

Workaround:

  • Connect the device via USB to your Mac

  • Launch Xcode Choose Window ->Devices

  • Right click on the device in left column, choose "Show Provisioning Profiles"

  • Click on the provisioning profile in question

  • Press the "-" button Continue to removing all affected profiles.

  • Re-install the app

    • Make sure you right click on the image of the device not the name of the device or you won't see the provisioning profiles option. I restored my new phone from an old backup and there was a lot of cruft hanging around, i also had 2 different dev. certs active (not sure why) but i deleted one, made a new profile got rid of all the profiles on device and it worked.

    Hope this helps someone else.

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