Install xcode

Install Homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Install node and npm

brew install node

Install Ionic CLI

npm i -g @ionic/cli

Install Cordova (if using, Capacitor probably needs installing too but I’m not using it yet)

npm i -g cordova

Fix error ionic cordova build tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance using:

sudo xcode-select -s /Applications/Xcode.app/Contents/Developer

Install Android Studio 2

Install Java JDK 1.8 and then add paths and fix DX error.

Should now be able to use Ionic and build for iOS and Android.