Apple: Taking OS X security seriously
During the days of Mac OS 9, Apple didn't need to pay much attention to security. Attacks on Mac OS boxes were extremely rare, successful ones well-nigh unheard-of. But Mac OS 9's excellent security record does not automatically transfer to OS X just because both OSes originate in Cupertino.
Thanks to Mac OS X's Unix plumbing, any vulnerabilities in Unix software can instantly become vulnerabilities in OS X. Unix vendors as a rule have always been quick to issue both security alerts and fixes for discovered holes. Which means that Apple now has a pretty high standard to live up to.
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