Thanks Engineer, I feel I'm way out of my depth. Just for context: I'm developing and distributing the open-source app xflr5 used in aerodynamic calculations. Tried xcrun notarytool store-credentials but I'm already stuck at step 1 by the request for my "Developer Apple ID:" is it a name? an e-mail address? something else? When renewing my developer membership, I was sent a team name and team-id but not a developer id. thanks again for any help. André