Hi all, I’m trying to notarize a Flutter macOS app built in CI (GitHub Actions). The app builds and signs fine locally—codesign --verify --deep --strict and spctl --assess both pass. However, Apple’s notarization service consistently rejects the app with errors like: The binary is not signed with a valid Developer ID certificate: file_picker.framework The binary is not signed with a valid Developer ID certificate: file_saver.framework The binary is not signed with a valid Developer ID certificate: url_launcher_macos.framework What I’ve tried: Explicitly re-signing all frameworks with my Developer ID Application certificate and --timestamp Removing existing signatures before re-signing Ensuring correct entitlements and bundle identifier Matching the app bundle name and identifier in all places Using both codesign --deep and manual signing of each binary Local validation always passes, but notarization fails in CI Certificate: I am using a “Developer ID Application” certificate (not a “Mac Developer” or “Apple Development” certificate). The output of codesign -dvv for the problematic frameworks shows: Authority=Developer ID Application: [My Name/Team] ([Team ID]) So I believe I am not making the common mistake of using the wrong certificate type. CI Environment: GitHub Actions, macos-latest runner Flutter 3.27.2, stable channel All secrets (cert, Apple ID, app-specific password, team ID) are set up Questions: Has anyone encountered this with Flutter plugins or CI builds? Are there known issues with signing Flutter plugin frameworks for notarization? Is there a way to get more detailed feedback from Apple’s notarization service? Any advice or pointers would be greatly appreciated. I’m happy to provide logs, scripts, or a minimal project if needed. Thanks!