The latest Mac operating system has arrived with a general release today. Catalina has been in developer and beta testing since June. It joins iOS 13 and other device operating systems that Apple released last month to bring the entire line of Apple hardware up-to-date.
macOS Catalina replaces the iTunes app with Music, TV and Podcasts apps and moves iOS device syncing to the Finder. It also includes a new Find My app, Screen Time in System Preferences, and many security and accessibility improvements. Major updates to existing apps include Photos, Reminders and Notes.
You can get Catalina by going to the Mac App Store on your compatible Mac. A list of compatible devices can be found at https://www.apple.com/macos/catalina/.