Both of these factors drive malware creators to develop for Windows. However, worms as well as potential vulnerabilities were noted in February 2006, which led some industry analysts and anti-virus companies to issue warnings that Apple's Mac OS X is not immune to viruses, as is commonly misconceived. Regardless, there has not been an outbreak of Mac malware, and Apple routinely issues security updates for its software.http://en.wikipedia.org/wiki/Macintosh#Software