Question: openvpn connect installer.pkg cannot be opened because it is from an unidentified developer?
Answer: pkg because it is from an unidentified developer, then proceed to step 1a. 1a) If your computer show an error message stating that " 'OpenVPN Connect Installer. pkg' can't be opened because it is from an unidentified developer", then you want to load System Preferences. ... You want to then click on "System Preferences".