How do I use a Mac? While the answer to this question takes us into lots of smaller topics, I'll do my best to make it clear and easy to digest.
My essential training course on macOS Big Sur addresses a simple question. In a way, you can think of it as the personality of your computer or the language you use to interact with it. The foundation that supports the interface and file storage, and the platform for launching and using applications. macOS is the operating system for Macintosh Computers.