Software⏱️ 3 min read📅 2026-06-15

How to Fix: Mac-Os 10.14.1: Error getting value for key 'initializationClass' of extension 'Xcode.DVTKitDFRSupport.Initializer'

Error getting value for key 'initializationClass' of extension 'Xcode.DVTKitDFRSupport.Initializer' in Mac-Os 10.14.1 (Mojave).

Quick Answer: Try reinstalling Xcode or updating to the latest version.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🔧 Proven Troubleshooting Steps
  3. 💡 Conclusion

Mac users running macOS 10.14.1 (Mojave) are experiencing an error when trying to open the terminal, specifically with the message 'Error getting value for key 'initializationClass' of extension 'Xcode.DVTKitDFRSupport.Initializer'. This issue affects users who have updated their MacBook Pro to this version of macOS.

This error can be frustrating as it prevents users from accessing certain features and functionality in Xcode, which is a crucial tool for developers. In this guide, we will walk you through the possible causes of this error and provide steps to resolve the issue.

💡 Why You Are Getting This Error

  • The primary cause of this error is a compatibility issue between the DVTKit framework and the AppKit framework. The DVTKit framework is used by Xcode for tasks such as code completion, debugging, and testing, while the AppKit framework provides the foundation for macOS user interface components. When these two frameworks are not compatible, it can lead to errors like this one.
  • Another possible cause of this error is a corrupted or outdated version of the DVTKit framework. This can occur when there is an issue with the installation or update process of Xcode.

🔧 Proven Troubleshooting Steps

Updating Xcode and reinstalling the DVTKit framework

  1. Step 1: Open the Terminal app on your MacBook Pro and type the following command to check for any available updates: `softwareupdate --all`. If an update is available, follow the prompts to install it.
  2. Step 2: Once the update is installed, open Xcode and go to `Xcode` > `Preferences` > `Locations`. Click on the `Show Package Contents` button next to `DVTKit Frameworks`, then delete the entire contents of this folder. Restart Xcode and let it reinstall the DVTKit framework.
  3. Step 3: After the DVTKit framework has been successfully reinstalled, try running the Terminal app again to see if the error persists.

Reinstalling macOS 10.14.1

  1. Step 1: If updating Xcode and reinstalling the DVTKit framework does not resolve the issue, you can try reinstalling a clean copy of macOS 10.14.1.
  2. Step 2: To do this, go to `System Preferences` > `Software Update`, click on the `Update Now` button, then select the `Reinstall macOS` option from the dropdown menu.

💡 Conclusion

If you have followed these steps and still encounter the error, it may be worth reaching out to Apple Support for further assistance. They will be able to provide more detailed guidance and potentially fix any underlying issues with your system. In the meantime, make sure to keep your Xcode app up-to-date and regularly clean install the DVTKit framework as a precautionary measure.

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