Apple has released a critical software patch to fix a security vulnerability that could allow hackers to directly infect iPhones and other Apple devices without any involvement of the owner. Here’s how to update various Apple devices, according to the company’s website.

BOSTON (AP) � Apple released a critical software patch to fix a security vulnerability that researchers said could allow hackers to directly infect iPhones and other Apple devices without any user action. Security researchers at the University of Toronto’s Citizen Lab said the flaw was exploited to plant spyware on a Saudi activist’s iPhone, and