In an earlier blog about antivirus programs, I briefly mentioned a malicious program called a rootkit. Make no mistake, rootkits are not something to be taken lightly. If your machine is infected with a rootkit, a hacker can access your computer remotely without your knowledge. And before all the Mac users shout in triumph about how Windows is vulnerable to every kind of exploits on the net, I would just like to make it clear that Macs has been equally susceptible to rootkits for a long time.