Learn to Run Your iOS Apps on macOS Using Catalyst! Catalyst allows you to take code that you've written for iOS devices and run it on macOS, opening up a whole new platform - and a new universe of users - that you can reach using your existing code and knowledge. But, there are differences in the platforms; you need to know these differences to make great macOS apps. In this book, you'll learn how to take an iOS app to macOS the easy...