What is macOS?
Desktop, laptop and home computers, and by web usage, it is the second most widely used desktop OS, after Microsoft Windows.
The power of Mac. Taken further
macOS Catalina gives you more of everything you love about Mac. Experience music, TV, and podcasts in three all-new Mac apps. Enjoy your favorite iPad apps now on your Mac. Extend your workspace and expand your creativity with iPad and Apple Pencil. And discover smart new features in the apps you use every day. Now you can take everything you do above and beyond.