They now get signed, an Info.plist is embedded, they’re notarized by Apple, use the hardened runtime, maybe the App Sandbox, and request entitlements. So how do you check their version?
fat binary
Will they be locked down completely, or run iPadOS? How could they run existing Mac apps? Some potential answers.
Apple showed a new App Store app, and Apple News, which had been ported to Mojave using its new cross-platform tool, Marzipan. But what will it do?
The Eclectic Light Company 