writes "After years of boasting about the Mac's near invincibility, Apple is now advising its customers to install security software on their computers. Apple — which has continually played on Windows' vulnerability to viruses in its advertising campaigns — issued the advice in a low-key message on its support forums. 'Apple encourages the widespread use of multiple antivirus utilities so that virus programmers have more than one application to circumvent, thus making the whole virus writing process more difficult.' It goes on to recommend a handful of products."
Reader wild_berry points out the BBC's story on the unexpected recommendation