I have a binary which I have signed with a valid developer certificate. Here is how I verify the signature was correctly applied: % codesign -dvv ./test_program.exe Executable=/Users/REDACTED/code_signing/test_program.exe Identifier=com.REDACTED.hello_world Format=Mach-O thin (arm64) CodeDirectory v=20500 size=489 flags=0x10000(runtime) hashes=9+2 location=embedded Signature size=9071 Authority=Mac Developer: REDACTED NAME (REDACTED_ID) Authority=Apple Worldwide Developer Relations Certification Authority Authority=Apple Root CA Timestamp=Apr 16, 2025 at 11:26:43 AM Info.plist=not bound TeamIdentifier=REDACTED Runtime Version=14.2.0 Sealed Resources=none Internal requirements count=1 size=192 ============================== Additionally, I have confirmed in keychain access that my certificate is valid. Here is the output from the GUI: Issued by: Apple Worldwide Developer Relations Certification Authority Expires: Wednesday, April 15, 2026 at 3:50:14 PM Eastern Daylight Time This certificate is valid ============================== When I zip then send the executable for notarization, I get an "Invalid" response. Here is the log from that response: % xcrun notarytool submit ./test_program.zip --keychain-profile REDACTED --wait Conducting pre-submission checks for test_program.zip and initiating connection to the Apple notary service... Submission ID received id: 0d64c285-eb59-4b34-b911-0e6cbb1dbc16 Upload progress: 100.00% (6.39 KB of 6.39 KB) Successfully uploaded file id: 0d64c285-eb59-4b34-b911-0e6cbb1dbc16 path: /Users/REDACTED/code_signing/test_program.zip Waiting for processing to complete. Current status: Invalid......... Processing complete id: 0d64c285-eb59-4b34-b911-0e6cbb1dbc16 status: Invalid =============================== And here is the log indicating the reason for the notarization failure: xcrun notarytool log "0d64c285-eb59-4b34-b911-0e6cbb1dbc16" --keychain-profile REDACTED "./log_file.txt" { "logFormatVersion": 1, "jobId": "0d64c285-eb59-4b34-b911-0e6cbb1dbc16", "status": "Invalid", "statusSummary": "Archive contains critical validation errors", "statusCode": 4000, "archiveFilename": "test_program.zip", "uploadDate": "2025-04-16T16:23:38.993Z", "sha256": "9e3bd03301f4930a0e4015873b435c8d64c291e7c63d0552f17652dc7ce16195", "ticketContents": null, "issues": [ { "severity": "error", "code": null, "path": "test_program.zip/test_program.exe", "message": "The binary is not signed with a valid Developer ID certificate.", "docUrl": "https://developer.apple.com/documentation/security/notarizing_macos_software_before_distribution/resolving_common_notarization_issues#3087721", "architecture": "arm64" } ] } ============================== The notarization server saying that it's not signed by a valid developer certificate, but to the best of my ability I have confirmed that a valid developer certificate is being used.