You will need Node, Watchman, the React Native command line interface, and Xcode.
While you can use any editor of your choice to develop your app, you will need to install Xcode in order to set up the necessary tooling to build your React Native app for iOS.
We recommend installing Node and Watchman using Homebrew. Run the following commands in a Terminal after installing Homebrew:
brew install node brew install watchman
If you have already installed Node on your system, make sure it is version 4 or newer.
Watchman is a tool by Facebook for watching changes in the filesystem. It is highly recommended you install it for better performance.
The easiest way to install Xcode is via the Mac App Store. Installing Xcode will also install the iOS Simulator and all the necessary tools to build your iOS app.
If you have already installed Xcode on your system, make sure it is version 8 or higher.
You will also need to install the Xcode Command Line Tools. Open Xcode, then choose "Preferences..." from the Xcode menu. Go to the Locations panel and install the tools by selecting the most recent version in the Command Line Tools dropdown.
