Although they have become much more secure in recent years Macs absolutely do get viruses more than most Mac enthusiasts would lead you to believe. Several years ago two of my friends and a third friend of theirs ended up getting very bad spyware/malware on their Macs and those people are all advanced system administrators and network engineers who have jobs involving network security. These weren't small time malware infections either. Two of the three infections required a complete low level formatting of their disk drives and a reinstall of MacOS/OSX.
Whats scary is that these friends knew what they were doing with decades of experience as high paid professional certified network administrators. They had taken more precautions than most users do to secure their networks and their Macs but because on some level they too had bought into the popular Mac culture myth and propaganda that "Macs never get viruses" none of them were using an antivirus for their Mac prior to getting the Mac malware infections.