Thanks, Quinn Resolved. Your --verbose suggestion was exactly what cracked it: the log showed the S3 multipart upload failing partway through, so the 406 MB payload never fully landed and the submissions sat In Progress until they GC'd (your first case). Root cause may have been related my local network; rebooting the router fixed it and the upload completed 82/82, Accepted in minutes. Really appreciate the quick, precise help. One note: on the bad connection notarytool crashed with a "zsh: bus error" mid-upload rather than returning a clean network error — that's what masked it as a service/account problem for two days. Thanks again