Update: the oldest of my four submissions cleared to Accepted after ~22h 40m in In Progress. The other three (submitted within ~1h of the first) are still In Progress. For other first-time notarisers landing here: in my case Eskimo's "couple of days" estimate held — wait ~24 hours before worrying, and only reply to your DTS case if you're still stuck after a full week. One gotcha worth flagging: since I rebuilt locally a few times while waiting (bumping metadata, changing arch), the .app on disk no longer matched the hash of the submission that was Accepted — so xcrun stapler staple failed with "Record not found". Had to rerun the build from scratch to get a notarized DMG. If you're in the same situation, don't discard your original signed .app while waiting.