Apple made a promise in 2020 to introduce a preference for users to opt out of security protections, including OCSP checks, but this promise was never implemented and has since been removed from Apple's support documents. The OCSP service checks if an app's Developer ID code signing certificate has been revoked by Apple. The removal of the promise has raised concerns about Apple's commitment to user privacy. Users can use a firewall like Little Snitch to block these connections.