Android tv box MAC address keeps changing
I faced for a similar issue.

However, i was not able to get the my old IPTV network on my Mac.

Therefore i had to go for another service.

Then i tried several apps like Cinema apk and all. However i ended up with using Cyberflix TV. this might help you https://techslott.com/cyberflix-tv-apk/ if you have not yet sorted the issue.