Apple said Monday it was developing a security fix for its Mac OS X computer operating system after a patch released for its iPhones and iPads to thwart hacker attacks. The California tech giant released its security update for the iOS 7 mobile operating system on Friday, saying that an attacker with a privileged network position may capture or modify data in a browsing session. An Apple spokesman told AFP, when asked about the Mac OS vulnerability, We are aware of this issue and already have a software fix that will be released very soon. Security researcher Graham Cluley said it was really important that you update your iPhones and iPads as quickly as possible.