If you were a Mac developer in 2006 and earlier, you didn't have to do anything that Apple wanted.
You didn't even need an Apple Developer account, or indeed an Apple ID (which was used primarily for iTunes Music Store purchases). The Xcode developer tools came on disc with every Mac.
I'm not sure that developers today can imagine such a world of freedom. They come in adopting a servile mindset.
@lapcatsoftware Before 2006 I was using CodeWarrior. But I’m not sure why you are specifying 2006. Seems like I didn’t need anything from Apple until notarization happened, around a decade later. Perhaps I’m misremembering?