Apple has always claimed that “Mac OS X isn’t plagued by constant attacks from viruses and malware” because its operating system was “designed with security in mind.”But about two weeks ago, Apple posted a note on its support Web site advising its customers to use more than one antivirus application to make their computers more secure.

“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,” the note explained.

Apple suggested three possible options: Intego VirusBarrier X5, McAfee VirusScan for Mac, and Symantec (NSDQ: SYMC) Norton Anti-Virus 11 for Macintosh.

Apple Recommends Antivirus Software For Mac OS X — Apple Mac OSX — InformationWeek.

Update: Apple axes antivirus help page