[heartjudytenuta]

Microsoft has had digital signing with Authenticode certificates for ~20 years now but they didn't give it a fancy name like "notarization" so nobody cares.

"Safely" is strong language that implies software digitally signed by Apple does not contain malware. In my experience, their system is more a sieve than the condom it purports to be.

[pornel]

Notarization is uploading the binary to Apple. This is different from signing. And it’s not your key, but theirs.