KeRanger malware, which appeared on Friday 4 March, was the first functioning ransomware to attack Apples Mac computers. Researchers say some Macs may have had files encrypted on Monday if infected. Apple has taken steps over the weekend to prevent attacks by revoking a digital certificate from a legitimate Apple developer that enabled the rogue software to install on Macs. In an ironic twist, the victim will be able to recover encrypted files when they are uploaded on the internet for public shaming.”]