When trying to run the README/documentation example code, an exception is raised when running

let swiftConfig = try! LanguageConfiguration(tree_sitter_swift(), name: "Swift")

The error is that it can't read the queries directory

Fatal error: 'try!' expression unexpectedly raised an error: SwiftTreeSitter.LanguageConfigurationError.queryDirectoryNotReadable(file:///path/to/build/directory/TreeSitterSwift_TreeSitterSwift.bundle/Contents/Resources/queries/

My best guess is that something changed in a recent macOS version regarding the output structure of bundle resources. When inspecting the actual file, TreeSitterSwift_TreeSitterSwift.bundle/queries exists with all the query files. This would thus work correctly if the platform was any other Apple platform based on the conditional compilation here: