Hello,
We are working on a version of our Mac product that offers in-app purchase. It seems since upgrading to Catalina a couple of days ago I can no longer sign in with an App Store Connect sandbox account to test in-app purchases. Here is what a somewhat typical testing flow looked like when I was testing on Mojave with Xcode 11.
TO TEST FIRST TIME USER EXPERIENCE
1. Sign out of the Mac App Store
2. Delete the _MASReceipt folder from the debug build app bundle.
3. Launch the debug build of the app from the Finder. At this point I would be presented with a screen to sign in to the Mac App Store.
4. Sign in with sandbox credentials and then app would quit, but there would then be a _MASReceipt folder in the app bundle.
5. Build and run the app from Xcode and debug and test and whatnot.
Now that with Catalina, I cannot get past step 3. I am presented with a dialog saying "SIgn In to the App Store" and the dialog does say [Environment: Sandbox] on it. I have tried 4 different Sandbox users and I can't get passed this dialog. It goes away briefly, but always pops back up and the receipt is never installed in the app bundle.
I have tried restarting several times, even with both fingers crossed.
Do I need to change my flow for Catalina or perhaps it is unrelated to the OS version and I'm just doing it wrong?