to make a mac build on steam I would need to own a mac to sign the build. the number of mac users on steam is 1.4% so its not worth me buying a mac just to make the build. I would love to have it available for everyone but just cant afford to. FYI I have made almost no money selling it on steam.
I'm just setting up a discord https://discord.gg/QZQNr2QE if you add me on there i can make you a free mac build though it might not work.