Hi @meaton, I'm reproducing this issue by running $ codesign -f -s Apple Development: <myappacountemail> (myaccountid) dist/MyAppName.app --deep Warning: unable to build chain to self-signed root for signer Apple Development: <myappacountemail> (myaccountid) dist/MyAppName.app: errSecInternalComponent Where MyAppName is application developed in the PyQt5 framework with PyInstaller as the distribution bundler. According to the PyInstaller documentation, I set the following: python3 -m PyInstaller ... --osx-bundle-identifier= Apple Development: <myappacountemail> (myaccountid) Not sure if this helps but my .spec file includes this bundle instruction: *- mode: python ; coding: utf-8 -*- MyAppName.spec -> as input for PyInstaller ... app = BUNDLE(exe, ttttttname='MyAppName.app', tttttticon='res/heartbeat.ico', ttttttbundle_identifier='com.guymeyer.myappname.ui', ttttttinfo_plist={ tttttttt'NSPrincipalClass': 'NSApplication', tttttttt'NSAppleScriptEnabled': False, tttttttt'CFBundleDoc