# carthage > Carthage is a dependency management tool for Cocoa applications. - Download and build all dependencies mentioned in Cartfile. Also used to update dependencies to their latest version: `carthage update` - Update dependencies and only build for iOS: `carthage update --platform ios` - Update dependencies but don't build: `carthage update --no-build` - Download and rebuild the current dependency set without updating: `carthage bootstrap` - Rebuild a specific dependency: `carthage build {{dependency}}`