'Rude awakening' for Mac users as cyber attack infects 550,000 of Apple's 'virus free' machines

'Rude awakening' for Mac users as cyber attack infects 550,000 of Apple's 'virus free' machines | Mail Online: "A new computer trojan has infected 550,000 machines running Apple's Mac OS X - and many could still be vulnerable. The infected machines are now part of a 'botnet' of zombie machines which can be controlled by cyber criminals and 'told' to download new malicious software."