How to create React native app in macBook Pro

xcode - 9.0
mac os - 10.13.1
node -v 8.9.4
npm -v 5.6.0

i try to this way like

1. npm install -g create-react-native-app
2. create-react-native-app AwesomeProject
3. cd AwesomeProject
4. npm start

but not working