This chapter will focus on Mac Catalyst, which makes it easy to build a Mac app from an existing iPad app. Your apps will share the same project and source code, so you can focus on adding Mac-specific features. By doing so, you will be able to reach an audience of over 100 million active Mac users.

In this chapter, you'll make a Mac version of the Let's Eat app from your existing iOS app. First, you'll refine the user interface of the app when running on the iPhone. Next, you'll learn how to make your app's user interface work on the iPad, taking advantage of the iPad's larger screen size to make it easier to use. After that, you'll use the iPad version of your app to create the Mac version.

By the end of this chapter, you'll be able to make your existing iPhone apps run well on iPad, and also be able to make Mac apps from your iPad apps.

The following topics will be covered:

• Cleaning up design elements
• Updating the app for iPad
• Updating the app for Mac