If you're used to buying TV shows and movies on iTunes on a Mac, the program will be missing the upgrade to macOS Catalina. [1
If you subscribe to Apple TV +, the streaming service is included in the TV app, where you can view Apple's original broadcasts, including Dickinson The Elephant Queen For All Humanity Ghostwriter Helpsters Oprah's Book Club The Morning Show, see and Snoopy in Space .
If you only upgrade to Catalina now, a TV app icon will appear in the Dock. How to use the Apple TV app.