You need a developer account to notarize your Mac app. That's the key he's talking about. Yes, technically you don't have to do that but then user's get scary warnings. It's not practical to not do that.Pirate Software doesn’t sound honest in his story. There is no license key for Xcode. It’s free to download and use for anyone. Only if you decide to sign and sell your app on App Store you have to pay $99 a year. So he could make the game in Xcode and sell it on Steam since he has a developer account there. Steam charges $100 for each game as a one-time fee. Once you’ve sold for $1000 you get the fee back.
So they had even a Beta game for Mac which they could have released on Steam without paying for App Store. He should’ve just said the real reason is they only had 0.02% Mac customers instead of complaining about buying a Mac and paying for App Store. Anything for the YT algoritm I guess.