Here's the Mac Workaround, the issue here is we don't own a Mac so we can't use xcode to sign the app.
From a user in our Discord:
Had to run this in terminal :
chmod +x WorldOfGrimm.app/Contents/MacOS/World\ of\ Grimm
Then had to right click on the app and hit open.
A prompt says the developer cannot be trusted, so I had to click Open from that prompt.
If you don't right click on the .app file and click open from the context menu, you get the prompt without the second Open button
There are a few Mac-owners in the community and you're more than welcome to jump in our Discord and ask them more context if needed!