I wanted to let everyone know that I'm aware now of an issue opening the Mac build. There seems to be a bug with the latest version of the game engine I use and how it signs Mac applications.
I can roll back to a previous engine version and export the build but that will introduce some bugs. But now that the game has started selling I can afford to pay for an Apple Developer account and properly sign Mac apps the way Apple likes it which means I can use the most current version of the engine.
However setting up the paperwork for the Apple Developer account will take a few days so I will ask for your patience in getting this handled. Doing this will ensure the game will work the same way on all platforms going forward.
Again, I apologize to those who just purchased the game for Mac. I am making this my first priority and will be uploading a new build ASAP. Thanks.