A virus is encrypting files on some Mac computers until users pay £280 for access, in the first such infection on Apple devices. A virus which locks computer users out of their files until they pay a ransom has started targeting Apple devices for the first time.Hackers have infected a number of Macs with "KeRanger" malware which demands owners pay one bitcoin (about £280) for their files to be unencrypted. Users began unwittingly downloading the malicious programme as they tried to install popular software called Transmission, which is used to transfer data on BitTorrent. The "ransomware" stays quiet for three days after infecting each computer - and then starts to make documents, photographs, videos and other precious files inaccessible. Cyber security experts believe the "KeRanger" virus was loaded onto the Transmission website on Friday - meaning affected Apple users could start receiving ransom demands from Monday unless they immediately install an updated version of the software.....Read more here