Note: This can add up to 5GB to install the needed components (including XCode and iOS build tools)
- Install XCode from the App store.
- Open your Unity AR project if not already open.
- Go to File > Build Settings
- Click on iOS
- Click Open Download page to download the iOS module if not already installed. Afterwards, run the Unity iOS setup installer until you've fully installed. The full install is 3GB!
- Once downloaded for good measure quit and restart Unity and go back to File > Build Settings..