Do you think your Mac is immune to malware infections? If you said Yes, you would be wrong. Although there may not be as much malware for a Mac as there is for Windows, you should still not be caught sleeping.
According to the Security firm Sophos, from November 2nd to November 16th 2010, their Sophos Anti-Virus for Mac Home Edition collected some 50,000 malware reports (This is based on an approximate 150,000 users).
Note that some of the above mentioned malware will just not run on a Mac, but there are some that will. For instance the DNS Changer and OSX/Jahlav are some specific examples of infections that you want to remove from you system right away. Some people make take this lightly as they have the idea stuck in their head that their Mac cannot be infected….but guess what it can.
My recommendation to anyone that owns a computer or mobile device is to protect yourself. Any device connected to the internet whether it be 3G, Wi-Fi, or on your LAN can be infected. Hopefully you do the right thing and I don’t have to say I told you so.