Yes. Windows users have to have Anti-Virus or other scanning programs because Microsoft doesn't get that it should have a secure operating system. Those system patches? They're simply to implement things like different funny computer sounds for different tasks. Most people don't know this and keep all the sounds default. Apple does have viruses and the like out there for them. In fact, I remember Apple themselves telling people to run an Anti-Virus on their computer. Link for the non-believers. They just don't have a lot. Why not? Simply because people don't care to mess with the 'smaller market share' Apple, or the coder of the virus was a disgruntled Linux user. Furthermore, I'll point you to this article. Take from it what you will.