Resolving the Xcode 11.2 “Unable to Install App file to Device” Issue

If you recently updated your macOS to Catalina and your Xcode to version 11.2, you might have encountered an error when trying to run a release version of your app on your device. The error message, “Unable to install the app,” can be frustrating, especially when you’re eager to test your app on a physical device. But fear not! We have some effective solutions to help you resolve this issue and get your app up and running smoothly. Let’s dive in!

Understanding the Error Message and Possible Causes

When you tap on the “details” option after receiving the “Unable to install the app” error, you may see the following failure reason:

code
A valid provisioning profile for this executable was not found.

This error occurs when Xcode cannot find a valid provisioning profile for your app. A provisioning profile is essential for code signing and allowing your app to run on physical devices. Several factors could contribute to this issue, such as incorrect provisioning profiles, changes in the build system, or other settings related to code signing.

Solution 1: Adjust the Build System Settings

1. Go to File and select Workspace Settings.
2. Ensure that your Build System is set to Legacy Build System .
   • Xcode 11 introduced changes in the build system, and using the legacy build system can help resolve certain issues related to provisioning profiles and app installations.

Solution 2: Check Dynamic Framework Settings

1. If your app includes dynamic frameworks, review their settings.
2. Ensure that the frameworks are set to Embed & Sign instead of Embed + Don’t Sign .
   • This change ensures that the dynamic frameworks are properly embedded and code signed during the app installation process.

Solution 3: Clean and Reinstall the App

1. Remove the app from your device.
2. Reinstall the app by following these steps:
   • Clean your project by pressing Cmd + K to clean the build folder.
   • Remove the Derived Data folder, located at /Users/youruser/Library/Developer/Xcode/DerivedData.
   • Restart Xcode.
   • Rebuild and run the app on your device.

Solution 4: Verify Provisioning Profiles and Certificates

1. Double-check your provisioning profiles and certificates to ensure they are correctly configured.
2. Make sure you have a valid provisioning profile for development purposes.
   • Create a new provisioning profile specifically for development if needed.
   • Select the correct provisioning profile in the Signing & Capabilities section of your Xcode project settings.
   • Verify that your provisioning profile is set to development mode, as opposed to distribution mode.

Solution 5: Enable Automatic Signing

1. If you haven’t done so already, try enabling Automatically manage signing in your Xcode project settings.
   • This feature automates the provisioning profile and code signing process, ensuring that Xcode handles the necessary configurations for you.

By implementing these solutions, you should be able to overcome the “Unable to install the app” error in Xcode 11.2. Remember to test your app on a physical device after resolving the issue to ensure smooth functionality and proper testing.

Keep in mind that these troubleshooting steps are based on common scenarios and experiences, and your specific case may have unique circumstances. If the error persists, don’t hesitate to seek further assistance from the Apple Developer Support team or consult the Xcode documentation for more in-depth guidance.

Now, go ahead, implement the solutions, and continue developing your app with confidence!