XCode – Validatition failed: Invalid Signature + Invalid bundle

Summary

The validation failure in XCode occurs due to invalid signature and invalid bundle issues. This happens when the application is not signed with a distribution certificate or when the bundle contains disallowed files.

Root Cause

The root cause of this issue is:

  • Incorrect code signing settings in Xcode
  • Use of ad hoc or development certificate instead of a distribution certificate
  • Bundle containing disallowed files, such as the ‘Frameworks’ file in the UnityFramework.framework directory
  • Building the application with a Simulator target instead of a Release target

Why This Happens in Real Systems

This issue occurs in real systems when:

  • Developers overlook code signing settings and use the wrong type of certificate
  • Automated build processes are not properly configured
  • Third-party libraries or frameworks are not properly integrated into the project
  • Xcode project settings are not correctly configured at the target level

Real-World Impact

The impact of this issue includes:

  • Failed app store submissions
  • Delayed release of applications
  • Increased development time and costs
  • Frustration and decreased productivity for developers

Example or Code (if necessary and relevant)

# Clean and rebuild the release target
xcodebuild clean
xcodebuild -scheme HoloMeet -configuration Release

How Senior Engineers Fix It

Senior engineers fix this issue by:

  • Verifying code signing settings in Xcode
  • Using the correct distribution certificate
  • Ensuring the bundle does not contain disallowed files
  • Building the application with a Release target
  • Cleaning and rebuilding the project as needed

Why Juniors Miss It

Junior engineers may miss this issue because they:

  • Lack experience with Xcode and code signing
  • Overlook important details in the project settings
  • Do not fully understand the differences between ad hoc, development, and distribution certificates
  • Rely too heavily on automated processes without proper configuration and testing