Recently my MacOS app started to show Apple ID login to continue download, right after In-App purchase is complete. None of my In-App purchases invole content download. I dn't host any content with Apple.
I tracked down the problem to the call to finishTransaction. Is there something I'm missing in the meta descritpion of my app in ItunesConect? or this is recently introduced bug in Apple's SKD?
I am having a similar problem with finishTransaction, but only on a brand new 16" MacBook Pro. I've now tested it on 3 other machines and it works on those. I am awaiting a response from Apple's DTS.
In my case, the 16" MacBook Pro is returning an existing transaction to the queueUpdated event, the other machines are return new transactions.
Are you using a 16" MacBook Pro?
Below is a link to my thread.