: Instead of double-clicking, Right-Click (or Control-Click) the application and select Open . A dialog will appear asking for confirmation; click Open again to bypass the developer warning.
Since macOS 10.14.5 (Mojave) and later, Apple requires all software to be notarized . Notarization means Apple has scanned the app for malicious content. xf-adesk19 is not notarized, so Gatekeeper blocks it.