Rattling off a list of anti-virus suites available on the Mac, Apple has encouraged “widespread” use of the programs, claiming it'll make virus writing a more difficult process. Realistically, though, what we see here is a change in the perception that Apple has about their own software in the world today. Typically, they work hard to avoid saying anything negative about Mac OS X, but admitting that users might need an anti-virus suite to stay safe is admitting that the OS is vulnerable after all – something numerous security researchers have been saying for a while.
This year has seen a number of viruses for Mac OS X find time in the public eye. While still not on the monumental level of viruses found on Windows, even Apple is now admitting that the OS alone is not enough to protect a user.