I wrote a blog post about how flash your RX 470 card on Mac / Linux for anyone interested
https://medium.com/@lukehamilton/flash-your-rx-470-card-on-mac-linux-7391fb78b6f6
Let me know if you have any questions, more than happy to help
https://medium.com/@lukehamilton/flash-your-rx-470-card-on-mac-linux-7391fb78b6f6
Let me know if you have any questions, more than happy to help