This.Unfortunately the author doesn't understand malware. Note all of the installers. At least with those shown in the link, you had to do something stupid to acquire the infection. This is not the same as a virus. People make the same mistake on Windows. Either way the author is uneducated.
Not a single one of those is a virus. Read the following link to understand the differences in various forms of malware. Macs are not immune to malware, but no true viruses exist in the wild that can run on Mac OS X, and there never have been any since it was released over 10 years ago. You cannot infect your Mac simply by visiting a website, unzipping a file, opening an email attachment or joining a network. The only malware in the wild that can affect Mac OS X is a handful of trojans, which cannot infect your Mac unless you actively install them, and they can be easily avoided with some basic education, common sense and care in what software you install. Also, Mac OS X Snow Leopard and Lion have anti-malware protection built in, further reducing the need for 3rd party antivirus apps.
No kidding! This is another reason not to believe everything you read. Here is the malware "authority" who wrote the article:Unfortunately the author doesn't understand malware. .... Either way the author is uneducated.