I just ordered a new Mac mini with the M1 chip so I can test what you are seeing. It was not possible to run my Walkout Song DJ app on a Mac before this year, but now that it is, I agree that a Mac would be a pretty good platform for the app, more people will try it, and I really need to be able to test with one.
It is scheduled for delivery on Tuesday, so I should have some clarity on the issue you are seeing this week. In the meantime, I would recommend trying it on an iPhone or iPad you have available so we can confirm the Mac environment is the culprit.