macOS is the operating system that runs Apple computers. It's the software layer between you and your hardware—the system that lets you open programs, save files, connect to the internet, and manage everything on your Mac. If you're new to Mac or switching from Windows, understanding what macOS does and how it works helps you find features when you need them and troubleshoot when something isn't working as expected.
These guides explain the fundamentals: how to navigate the desktop and menus, what the Dock and Finder do, how to install and update software, and where to find settings that control how your Mac behaves. You'll learn the basic tasks that form the foundation for using your computer confidently.