Software⏱️ 2 min read📅 2026-05-31

How to Fix: Xcode process launch failed: Security

Error occurs after iOS 8 GM update, simulator works fine.

Quick Answer: Try reinstalling Xcode and the project to resolve the issue.

The error 'process launch failed: Security' can be caused by a variety of factors, including a mismatch between the iOS version installed on your device and the version used in your Xcode project. When you updated to iOS 8 GM, it's possible that your app is still using an older version of iOS that's not compatible with the new operating system.

🛑 Root Causes of the Error

  • Outdated iOS version in Xcode project
  • Mismatch between device and simulator versions

🛠️ Step-by-Step Verified Fixes

Method 1: Update Xcode Project to Latest iOS Version

  1. Step 1: Open your Xcode project in the Xcode app on your Mac.
  2. Step 2: Click on the 'General' tab and select the 'Deployment Information' section.
  3. Step 3: Update the 'iOS Simulator' version to match the iOS 8 GM version installed on your device.

Method 2: Clean and Rebuild Project

  1. Step 1: Go to 'Product' > 'Clean Build Folder' in the Xcode menu.
  2. Step 2: Rebuild your project by clicking on 'Product' > 'Build' or press Command + B.

💡 Conclusion

By following these steps, you should be able to resolve the 'process launch failed: Security' error and get your app running on your iPhone 5S with iOS 8 GM.

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