Will universal (i386+x86_64) still be available in Mac App Store?

There’s two parts to this question:

• What will macOS 10.15 run? (A)

• What will the Mac App store allow? (B)

With regards A, macOS 10.15 beta currently runs the 64-bit Intel architecture from your app, ignoring the 32-bit Intel architecture completely. I wouldn’t expect that to change by GM.

With regards B, I don’t work for App Review and can’t give you definitive answers about their policies, but I’m not aware of any announced changes in this space. Having said that, if your app’s deployment target is 10.7 or later — and keep in mind that the Mac App Store was only introduced in 10.6.8! — there’s unlikely to be any reason to require 32-bit Intel code. macOS 10.7 and later only run on 64-bit capable machines.

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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"