Apple's Mac OS X computers may not have a strong enough user base that the evil-doers on the Internet want to bother writing exploits and spy-ware, at least compared to the infinite number of Windows based computers. Why write code for millions of computers when you can write for billions?
However, Apple may soon find itself in the hacker spotlight thanks to the success of the iPhone. Word has it, that security experts in Baltimore said they found a "flaw in iPhone handsets that can be used by attackers to access private data stored on it".