I have a basic Hello World Cordova application working on an Android emulator (Nexus 4) on my Mac. I wanted to try deploying to a Samsung Galaxy S3 that I have (model SCH-R530M) but when I try running
Is it in developer mode?
Does it allow USB debugging?
These are the instructions for your device: https://muffinresearch.co.uk/samsung-galaxy-s3-where-are-the-developer-options/
Go to Settings → More → About Device Scroll down to Build Number Tap it repeatedly (It'll show a message telling you how many more times you need to tap it to enable developer mode). See the Developer options menu under Settings → More
Then make sure 'usb debugging' is selected in the developer options.