I've recently downloaded quite a number of Mac programs directly from the web, as well as from Steam. They work just fine, as long as they've been signed. Wha

I've recently downloaded quite a number of Mac programs directly from the web, as well as from Steam. They work just fine, as long as they've been signed. What makes you say that Apple has made a "decision to disallow installing apps that were not downloaded from the macOS-app store"? That seems kind of obviously untrue. I mean, I myself sell Mac software outside the Mac App Store and have never had a complaint. Maybe you were thinking of the iOS app store?