I am pretty much at a loss here... In the past I used altool which worked. Not sure of related though, been a while since. But the same build script I use, just replaced altool with notarytool I first codesigen `MYNAME@MYMACNAME ~ % codesign --verbose --force --options runtime --timestamp --sign "COMPANYSIGN" "/Volumes/DiskW/projects-cool-MYNAME/MYPRODPATH/osx/final_MYPRODNAME-dist/mac-MYPRODNAME-files/MYPRODNAME.app" /Volumes/DiskW/projects-cool-MYNAME/MYPRODPATH/osx/final_MYPRODNAME-dist/mac-MYPRODNAME-files/MYPRODNAME.app: replacing existing signature /Volumes/DiskW/projects-cool-MYNAME/MYPRODPATH/osx/final_MYPRODNAME-dist/mac-MYPRODNAME-files/MYPRODNAME.app: signed app bundle with Mach-O thin (x86_64) [com.MYCOMPANY.MYPRODNAME] MYNAME@MYMACNAME ~ % ` Then display entitlements: MYNAME@MYMACNAME ~ % codesign --verbose --display --entitlements :- "/Volumes/DiskW/projects-cool-MYNAME/MYPRODPATH/osx/final_MYPRODNAME-dist/mac-MYPRODNAME-files/MYPRODNAME.app" Executable=/Volumes/DiskW/projects-cool-MYNAME/MYPRODPATH/osx/final_MYPRODNAME-dist/mac-MYPRODNAME-files/MYPRODNAME.app/Contents/MacOS/MYPRODNAME Identifier=com.MYCOMPANY.MYPRODNAME Format=app bundle with Mach-O thin (x86_64) CodeDirectory v=20500 size=127176 flags=0x10000(runtime) hashes=3967+3 location=embedded Signature size=9057 Timestamp=16 May 2024 at 11.49.11 Info.plist entries=17 TeamIdentifier=MYTEAMID Runtime Version=10.16.0 Sealed Resources version=2 rules=13 files=279 Internal requirements count=1 size=188 MYNAME@MYMACNAME ~ % Then I try do notarization (see next post)