I'm not completely sure (I don't have Macs to test), but I this MM 0.97 doesn't work on a Mac M1, but 0.98 will. Could you please test a dev release? You can download it here (you'll have to be logged in on Github, download links are at the bottom of the page): https://github.com/RodZill4/material-maker/actions/runs/1574193793