itch.io

Yeah its a 64 bit Intel Core I7, Im used to the terminal and tried a few tweaks :

such as disabling GateKeeper (both ways) :

sudo spctl --master-disable 

and

sudo xattr -rd com.apple.quarantine "$FILEPATH"  

None of these methods worked. When doing

sudo chmod 777 "$FILEPATH"

on the app I couldn't open it, I found out that doing the very same command on the archive then unzipping it solved the problem.

To avoid this problem in the future I think you should add the process in some installation guide. Or find a way to ship a .zip with the correct permissions. But most of the time to install an app on mac devs provide a .dmg that you can make with disk utility, terminal, dropDMG, (you'll need a mac your friend or I could provide the .dmg to you or through a VM) or alternatively a .iso that can be made on windows.

I can provide some tests for mac if you need them, I got some suggestions, but I saw that you prefer to add the ones of you patrons (which I can understand). On a les mêmes fuseaux horaires, je suis aussi français.