Ah, I'm sorry to hear! I don't know much about macOS and how to bypass it or make the game work in that environment.

I searched, and if it's about unknown developer verification stuff, seems like it could be solved with changing some settings? There's also about using the Itch.io launcher instead if you mostly get games from the website itself. If you have tried both and it still does not work, then I apologize, I can't help much further!

Hey Pinfel! I play on mac and here's how to bypass security stuff: 

1. Download the game file you want and open it
2. You'll get a message Error that says "[game] cannot be opened because the developer cannot be verified. macOS cannot verify that this app is free from Malware. You're only options will be "Move to Trash" and "Cancel" --- KEEP THIS WINDOW UP, for now.
3. Navigate to your System Settings App
4. Navigate to "Privacy & Security" - it should be 13th in the system settings app list but you can also search for it.
5. Scroll down to the section that says "security" - There's a box that says "Allow applications downloaded from App Store or App Store and identified developers." Make sure that the button that says "App Store and identified developers "is selected.
6. Remember the window from Step 2? While you have your Settings and Privacy system settings window open hit cancel (while you're looking at the security section)
7. Underneath that box in Step 5 there's another message that will pop up and say "[Game] was blocked from use because it is not from an identified developer" with a button that says Open anyway*---* Select open anyway
8. If you have a password for your mac it might prompt you to enter your password/touch ID.
9. Another message will pop up -- "MacOS cannot verify the developer of [Game]. Are you sure you want to open it? By opening this app you will be overriding system security which can expose your computer and personal information to malware that may harm your Mac or compromise your privacy." --- You'll get three options this time -- Open, Move to Trash or Cancel. Go ahead and select Open.
10. Voila! You should be able to get your game to start up!