i. What You Need

To follow along with the tutorials in this book, you’ll need the following:

• A Mac running the latest point release of macOS Catalina or later: You’ll need this to be able to install the latest version of Xcode.
• Xcode 11 or later: Xcode is the main development tool for iOS. You can download the latest version of Xcode for free on the Mac app store here: https://itunes.apple.com/app/xcode/id497799835?mt=12
• An intermediate level knowledge of Swift and iOS development. This book is about learning RxSwift specifically; to understand the rest of the project code and how the accompanying demo projects work you will need at least an intermediate understanding of Swift and UIKit.

If you want to try things out on a physical iOS device, you’ll need a developer account with Apple, which you can obtain for free. However, all the sample projects in this book will work just fine in the iOS Simulator bundled with Xcode, so the paid developer account is completely optional.