The developer's original 2020 upload is permanently broken for macOS 12+.
Even a "fixed" download can break depending on your specific setup. Here is the surgeon's guide: Bad Time Trio Mac Download Fixed
You can bypass download issues entirely by playing the completed fight via TurboWarp , which runs the game in a web browser using JavaScript. The developer's original 2020 upload is permanently broken
If you are on macOS 14+ or 15+, the game still might refuse to launch because of missing entitlements. Enable permissions for Terminal to allow the patch to run, or hold Control while right-clicking the app and select Open (not double-click). Then click "Open" in the warning dialog. Bad Time Trio Mac Download Fixed