codesign

Create and manipulate code signatures for macOS. More information: https://keith.github.io/xcode-man-pages/codesign.1.html.

• Sign an application with a certificate:

codesign --sign "{{My Company Name}}" {{path/to/application_file.app}}

• Verify the certificate of an application:

codesign --verify {{path/to/application_file.app}}