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A long time ago iOS 6 or 5 had the same issues with updating the iOS.

Their solution was to push an app to App Store which was called "iOS updater" or something. Installing and launching it would allow you install iOS update from Settings app.

I think they will do the same with Mac

Not to say that Apple doesn’t have other options, but I don’t think they can “push a fix via antivirus”. XProtect can remove software (like Zoom), but I don’t believe it can reconfigure the system.

Or whatever they did to remove the Zoom vulnerability.