In a challenge to the prevailing belief that Apple computers are immune to the sort of cyberattacks that plague WIndows-based machines, research firm Sophos has released a study claiming that one in five Macs have malware. The report, released on Tuesday, is based on a “100,000-strong snapshot” of the millions of Macs that downloaded Sophos’s free Mac antivirus software. The study found that 20% of Macs were carrying one or more instances of Windows malware. Such malware doesn’t cause symptoms unless the Mac owners run Windows on their machines, but it can be spread to others. However, this doesn’t appear...
