-install react-native-debugger vai hoomebrew: brew update && brew cask install react-native-debugger
-install redux-devtools-extension npm install --save redux-devtools-extension
-in package.json => object "scripts", by replacing PORT with your react native runnning port. by default it's 8081 "scripts":{ .... "debug" : "open 'rndebugger://set-debugger-loc?host=localhost&port=PORT'"