@emasie Here's the screenshot, hope it helps and please keep us posted!
imgur.com/MeiBvXa
Hoshi
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Actually... I'm still getting the error:
Dear Developer,
We identified one or more issues with a recent delivery for your app, "MyAppName" 2.1 (2). Your delivery was successful, but you may wish to correct the following issues in your next delivery:
ITMS-90863: Apple silicon Macs support issue - The app has LSApplicationLaunchProhibited set to true. This is not supported on Mac.
After you’ve corrected the issues, you can upload a new binary to App Store Connect.
Best regards,
The App Store Team
Thanks rickcurran, I'll try! I just upgraded my Xcode to Version 12.2 (12B45b) and can confirm that the "Mac" checkbox xcode is indeed there now.