The first known ransomware attack on Apple Mac computers was discovered over the weekend. It was downloaded more than 6,000 times before the threat was contained, according to a developer whose product was tainted with the malicious software. Hackers infected Macs with the “KeRanger” ransomware through a tainted copy of Transmission, a popular program for transferring data through the BitTorrent peer-to-peer file sharing network. For your information, ransomware is a type of malicious software that restricts access to a computer system in some way and demands the user pay a ransom to the malware operators to remove the restriction. Transmission responded by removing the malicious 2.90 version of its software from its website (www.transmissionbt.com). On Sunday, it released version 2.92, which its website says automatically removes the ransomware from infected Macs.