How To Prevent Malware on Lion & Snow Leopard Macs

The myth that Macs are immune to viruses was put to rest once and for all by Flashback, a malware program that infected hundreds of thousands of Macs. As a result of that attack, Apple was forced to respond with a removal tool. Don't wait for the next big Mac breach--there are five simple things you can do now to keep your Mac safe from infection. Here they are.

Use a non-administrator account: Step 1

To set up a non-admin account, open system preferences, and under the System heading click Accounts. In the bottom left of the account pane, click the lock to enable changes.

Enter your credentials. Next, click the "+" button just below Login Options, which is now enabled.