What you need for this book

This book's content and code examples were written using Xcode 7 and Swift 2.0. To follow along with the tutorials, you will need the following:

• Mac OS 10.9 or later: Currently the Swift IDE, compiler, and tools are only available for Mac OS.
• Xcode 7.0 or later: Xcode is the main development tool for Swift iOS and Mac apps. It can be installed via the Mac AppStore at https://itunes.apple.com/en/app/xcode/id497799835?mt=12.
• Command-line tools for Xcode and simulators: Once you have installed Xcode and launched it, it will offer to install additional command-line tools. Xcode installs simulators by default, but you can download more simulators by going to Xcode | Preferences | Download.