install react native on mac catalina code example

Example 1: react native installation

npm install -g react-native-cli

//cd to the file where your react native projects will be 
react-native init albums

// Run instructions for  IOS/Android
cd projects/albums 

npx react-native run-ios
npx react-native run-android

Example 2: react native new project mac

// Select a folder whereyou want to save the project
//go into that folder

cd React_Native_Projects
//to avoid some future problems when starting the simulator, i installed cocoapods in the general folder for all the projects (i didn't have it installed)
sudo gem install cocoapods

//create the new react native project
react-native init react-project //project with the name 'react-project'

//go into the project folder
cd react-project

//you can now lauch the simulator
react-native run-ios

//if you run into the error 'Failed to build iOS project. We ran 'xcodebuild' command but it exited with error code 65'
//try doing this
cd ios
pod install
rm -rf build/
cd ..
react-native run-ios