A Mac isn’t susceptible to the thousands of viruses plaguing Windows-based computers. That’s thanks to built-in defenses in Mac OS X that keep you safe, without any work on your part.
Safeguard your data. By doing nothing.
With virtually no effort on your part, OS X defends against viruses and other malicious applications, or malware. For example, it thwarts hackers through a technique called “sandboxing” — restricting what actions programs can perform on your Mac, what files they can access, and what other programs they can launch. With FileVault 2, your data is safe and secure — even if it falls into the wrong hands. FileVault 2 encrypts the entire drive on your Mac, protecting your data with XTS-AESW 128 encryption. Initial encryption is fast and unobtrusive. It can also encrypt any removable drive, helping you secure Time Machine backups or other external drives with ease. Other automatic security features include Library Randomization, which prevents malicious commands from finding their targets, and Execute Disable, which protects the memory in your Mac from attacks.
Download with peace of mind.
Innocent-looking files downloaded over the Internet may contain dangerous malware in disguise. That’s why files you download using Safari, Mail, and iChat are screened to determine if they contain applications. If they do, OS X alerts you, then warns you the first time you open one.
Stay up to date, automatically.
When a potential security threat arises, Apple responds quickly by providing software updates and security enhancements you can download automatically and install with a click. So you’re not tasked with tracking down updates yourself and installing all of them one by one.
Protect what’s important.
OS X makes it easy to stay safe online, whether you’re checking your bank account, sending confidential email, or sharing files with friends and coworkers. Features such as Password Assistant help you lock out identity thieves who are after personal data, while built-in encryption technologies protect your private information and communications. Safari also uses antiphishing technology to protect you from fraudulent websites. If you visit a suspicious site, Safari disables the page and displays an alert warning you about its suspect nature.
Well, one thing we can take away from this for certain.
Apple computers are not PC's. So sayeth their website.
This is where Macolites reply with "So sayeth the flock".