# How to reindex your Xcode 4 / 5 Projects
If you’ve every run into the problem of Xcode not being able to find symbols or method definitions of Vendor frameworks, although you’re complete sure their existing. Try to delete some of Xcode’s DerivedData to start Xcode’s Indexing process again.
- Quit any running Xcode 4 / 5 instance
- Open Finder and navigate to ~/Library/Developer/Xcode/DerivedData
- Find the name of your project(s) you’d like to be freshly reindexed
- Completely remove the desired directory(ies) Start Xcode again, the reindex process will begin asap.
- Be happy ;-)