The macOS Quarantine Bit Error Message is Bad

Whenever you download a file in macOS, your computer automatically sets a special bit called the quarantine bit. Apple has a complicated system that makes this precaution invisible for popular apps, involving developer certs, code signing, a system called GateKeeper that evaluates trustworthiness, and surely plenty of 30% mafia-style protection fees. For many users, this system acts as an extra…