Objective-C Runtime

The Objective-C Runtime is the system responsible for managing the behavior of Objective-C programs during execution. It dynamically handles class definitions, object creation, method calls, and message passing, allowing programs to adapt and modify behavior at runtime. Think of it as the engine that interprets and manages instructions, enabling features like dynamic method resolution and introspection. This runtime system provides flexibility, making it possible to alter or extend program functionality without changing the core code, which is especially useful in developing adaptable, modular applications in Apple's ecosystem.