Cocoa is the umbrella framework for macOS app development, bundling AppKit, Foundation, and Core Data. It exposes no types of its own; instead, importing it brings in the user interface layer from AppKit, the data types and system services of Foundation, and the object persistence of Core Data together. You use it as the foundation for building native macOS applications.
This module re-exports or extends other frameworks; it declares no public types of its own in the synthesized interface.