macos - How to add codesigning to dmg file in mac

Question

I have a dmg file in my portal.After downloading it,when i try to open it is showing a message indicating that opening package is insecure. i am able to add codesign through command line using codesign command and also able to check whether it is added or not. but still when i click to open my dmg file insecure message is coming

Answer 1

As of macOS 10.11.5 you can now sign disk images, .dmg, files using the codesign tool:

codesign -s <identity> --keychain <full-path-to-keychain> <path-to-disk-image>