You've probably heard that Macs don't need antivirus software. Whoever told you that was wrong. The idea that Macs are generally more secure than PCs isn't totally off-base. Windows does tend to have more security vulnerabilities because, while Apple does everything in-house, Windows operates on hardware from a handful of manufacturers. Apple's closed-loop system simply makes holes smaller and harder to infiltrate. But that doesn't mean Mac's security is hole-free. Antivirus software is still a worthwhile purchase. Do hackers prefer Macs or PCs? It's been a handful of years since Apple revealed that PC has it beat popularity-wise (by about four times, or 300 million active users). Apple's been chomping away at the market share, but still, fewer people own Macs. Fewer Mac owners, fewer targets for criminals, right? Hackers are obviously more likely to create malware that'll affect more people's computers rather than spend extra time working around a tricky OS that fewer people have installed.