Hi, We have developed an application only for some of our clients. We don't want to publish it over app store. We want our clients to download and installed this app from their portals. When our clients (specific users) are installing this app they are facing an "unidentified developer" error message. We are signing this application using "Global sign" EV code signing certificate, but still receiving this error. Platform: Mac OS (Latest and previous one). language: NodeJs with Electron. File type: dmg (install a .app file in applications). Signing tool: codesign If I am not wrong, we need a EV code signing certificate from Apple to avoid this message, if yes then please provide me some information or URL from where I can buy this certificate. If not then what is the alternative of this and how can I avoid this error message on installation. Any help will be highly appreciate.