While sorting through this issue, I realized that if you have the System Preference "General -> Close Windows when quitting app" set "On" that the system removes the previously saved sessions and creates a new session when starting the app. Of course, this makes sense for a document based app (and probably many others). However, it is a change from the older state restoration mechanism where the information about the view controller hierarchy was available regardless of this System Preference. It is easy enough to have your own mechanism for saving state that can be used in the case that the previous session is removed for apps that it makes sense for.Hopefully that helps anyone that comes across this thread.Cheers,Greg

I've been encountering this same issue. I've got the situation where I have an older test user (from a different app) showing up automaically in the credentials and whe I enter a known valid test user for this app I get the "Your Apple ID or password is incorrect." message.That made me think that somehow the sign in was trying to reference this older app. To test this theory I created a new user on my Mac and built the app as that user. When I tried to run it, the sign in popup came up empty and when I entered the test user that I had been trying previously it worked correctly.When I went back to my normal accont on my Mac I still got the "Your Apple ID or password is incorrect." message with those same credentials.That makes me think that something is baked into my normal acount that is somehow directly the sign in to the wrong App Store Connect account. I image if I could find where this prefiled Apple ID is coming from I could correct the issue. Does anyone have any idea where this informaton is stored?Thanks,Greg

On the Mac you need to use the machine's mac address instead of the identifierForVendor as you do on iPhone/iPad. Take a look at: https://developer.apple.com/library/archive/releasenotes/General/ValidateAppStoreReceipt/Chapters/ValidateLocally.html#//apple_ref/doc/uid/TP40010573-CH1-SW10You can use the "copy_mac_address()" code on this page to replace the identifierForVendor when building up the expectedHash in the macCatalyst case.