ocaml@4 for Mac

OCaml is a general-purpose programming language from the ML family that emphasizes expressiveness and safety, and is often used in development scenarios with high reliability requirements. It supports functional programming while also accommodating imperative and object-oriented styles, and its type system helps catch many potential problems at compile time. As a command-line tool, it suits developers who need to write, compile, and run programs in the terminal. For programming language enthusiasts, learners of functional programming, and technical professionals working on compilers, program analysis, finance, or system-level tool development, OCaml offers a choice that balances engineering practicality with academic tradition.