Take In the Scenic View
Since you’ve bought this book, I assume you’ve already decided to upgrade to Catalina and don’t need convincing that it’s worth your time and effort. However, I would like to call attention to some of the biggest changes in Catalina that you can look forward to.
In addition, if you’re upgrading from an operating system older than macOS 10.14 Mojave, you may be interested to know what other features were added along the way—as well as some that were removed.
Find Out What’s New in Catalina
Apple has a list of new Catalina features on this webpage. I won’t catalog them all here, but I’d like to list some of the most notable changes and improvements since 10.14 Mojave:
No more iTunes: Apple no longer includes an app called ...