I have a game I made in Godot v3.0.6, exported for Mac but I got a reply that a user using MacBook Pro Early 2015 macOS Mojave can't run it. I exported using the default MacOsX template, is there anything I'm missing?
People need to know more if they are going to be able to help.
Is there an error message when they try to run the game?
I have a mac if there is a link to the game then I could try running it for you.