Thanks for your reply,I installed the .pkg and then run codesign -v -vvv /Applications/MyApp.app, getting this:--prepared:/Applications/MyApp.app/Contents/Frameworks/Squirrel.framework/Versions/Current/. --validated:/Applications/MyApp.app/Contents/Frameworks/Squirrel.framework/Versions/Current/. --prepared:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Renderer).app --validated:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Renderer).app --prepared:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (GPU).app --validated:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (GPU).app --prepared:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper.app --validated:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper.app --prepared:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Plugin).app --validated:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Plugin).app --prepared:/Applications/MyApp.app/Contents/Frameworks/ReactiveCocoa.framework/Versions/Current/. --validated:/Applications/MyApp.app/Contents/Frameworks/ReactiveCocoa.framework/Versions/Current/. --prepared:/Applications/MyApp.app/Contents/Frameworks/Mantle.framework/Versions/Current/. --validated:/Applications/MyApp.app/Contents/Frameworks/Mantle.framework/Versions/Current/. --prepared:/Applications/MyApp.app/Contents/Frameworks/Electron Framework.framework/Versions/Current/. --validated:/Applications/MyApp.app/Contents/Frameworks/Electron Framework.framework/Versions/Current/. /Applications/MyApp.app: a sealed resource is missing or invalid file missing: /Applications/MyApp.app/Contents/Resources/app/remote/semantic/.versions file missing: /Applications/MyApp.app/Contents/Resources/app/remote/semantic/LICENSEbut also run codesign -vvv --deep --strict /Applications/MyApp.app--prepared:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Renderer).app --validated:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Renderer).app --prepared:/Applications/MyApp.app/Contents/Frameworks/Squirrel.framework/Versions/Current/. --prepared:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Plugin).app --validated:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (Plugin).app --validated:/Applications/MyApp.app/Contents/Frameworks/Squirrel.framework/Versions/Current/. --prepared:/Applications/MyApp.app/Contents/Frameworks/Mantle.framework/Versions/Current/. --prepared:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (GPU).app --validated:/Applications/MyApp.app/Contents/Frameworks/MyApp Helper (GPU).app --prepared:/Applications/MyApp.app/Contents/Frameworks/ReactiveCocoa.framework/Versions/Current/. --validated:/Applications/MyApp.app/Contents/Frameworks/ReactiveCocoa.framework/Versions/Current/. --prepared:/Applications/MyApp.app/Contents/Frameworks/Electron Framework.framework/Versions/Current/. --validated:/Applications/MyApp.app/Contents/Frameworks/Electron Framework.framework/Versions/Current/. /Applications/MyApp.app: a sealed resource is missing or invalid In subcomponent: /Applications/MyApp.app/Contents/Frameworks/Mantle.framework file missing: /Applications/MyApp.app/Contents/Frameworks/Mantle.framework/Versions/Current/Headers/NSValueTransformer+MTLInversionAdditions.hcodesign -v -vvv /Applications/MayApp.app/Contents/Frameworks/Mantle.framework/Versions/A/Mantle/Applications/MyApp.app/Contents/Frameworks/Mantle.framework/Versions/A/Mantle: a sealed resource is missing or invalid file missing: /Applications/MyApp.app/Contents/Frameworks/Mantle.framework/Versions/A/Headers/NSValueTransformer+MTLInversionAdditions.hThank you, although still have the problem I think this narrow the scope