This is what macOS codesigning does. Notarization goes one step further and anchors the signature to an Apple-owned CA to attest that Apple has tied the signature to an Apple developer account.

As I understand it, this attack works because the worm looks for improperly stored secrets/keys/credentials. Once it find them it publishes malicious versions of those packages. It hits NPM because it’s an easy target… but I could easily imagine it hitting pip or the repo of some other popular language.

In principle, what’s stopping the technique from targeting macos CI runners which improperly store keys used for Notorization signing? Or… is it impossible to automate a publishing step for macos? Does that always require a human to do a manual thing from their account to get a project published?