Itch app can fix this, however some people (like myself) don’t feel like installing it.

Two possible things could be happening. The first one can be fixed by doing the following. After extracting:

1. Open Terminal app.
2. cd Downloads or whichever folder you used to download
3. xattr -dr com.apple.quarantine Digital-Logic-Sim.app

After that, you should be able to run. If you still can’t, try the following:

chmod +x Digital-Logic-Sim.app/Contents/MacOS/Digital-Logic-Sim

and all errors should be fixed. If anyone else on Mac needs support, I can help.

you can also first attempt to run the app, open system settings, scroll to "privacy & security", find "open anyway" and click that. then click "open anyway" in the popup. thats what i did

That stopped working for me a while back… Glad it still works for you however!