<p>I don’t buy the whole “fewer macs ->fewer vulnerabilities” argument.</p>
<p>You just have to look at non-consumer markets. Unix-type OS’s are far more dominant in, say, the server market (>50%) yet there are still far fewer critical vulnerabilities. The unix security model (from which Macs inherit) is simply superior to windows’s, at least for right now.</p>
<p>And every computer system is going to have vulnerabilities, security flaws, and virus-type malware - but some systems are secure enough that you don’t have to worry as much as long as you’re careful as a user not to download suspicious stuff.</p>