How to Skip Macro Validation in Xcode

To prevent recurring warnings and errors about macros being disabled when using libraries with macros in your Xcode project, you can try the following methods:

1. Trust the Macro Package

When prompted, choose to trust and enable the macros. This should prevent future warnings. However, if you frequently clean your SPM caches or switch branches, you may need to re-enable them.

2. Use Command Line Arguments

Add the -skipMacroValidation flag to your Xcode build settings:

• Select your project in the Xcode navigator
• Choose your target
• Go to Build Settings
• Add -skipMacroValidation to Other Swift Flags

3. Set a User Default

Skip macro validation globally with this command:

defaults write com.apple.dt.Xcode IDESkipMacroFingerprintValidation -bool YES

4. Use Standard Build Configurations

Switch to the standard Debug and Release configurations if using custom ones, as this can resolve macro-related issues with various libraries.

5. Check Package Resolution

Ensure your Package.resolved file is up-to-date and committed to your repository to maintain consistency across environments.

6. Clear Derived Data

If issues persist:

• Go to Xcode > Preferences > Locations
• Click the arrow next to Derived Data
• Delete the folder contents

Note: Only trust macro packages from reliable sources, as macros can potentially run arbitrary code during compilation.