5 tips to keep your Mac secure
Apple’s ‘cloak of invulnerability’ has lately been shredded by the MacDefender fake antivirus and the Pinhead and Boonana Trojans. Don’t worry, be proactive. Here are five tips to make your Mac more secure:
1. Don't use 'automatic login'
It's cool to turn your computer on and instantly use it. But troubles can start when a computer is turned on by someone other than its owner… If you are concerned about your sensitive data, you can encrypt or simply disable the 'automatic login' function. Here's how to do it:
1) Go to System Preferences > Security
2) Authenticate yourself by clicking Click the lock to make changes
3) Check Disable automatic login 
2. Don't allow the normal user to be the computer administer
Running as a normal user is the sensible thing to do on any operating system, OS X included.
1) Go to System Preferences > Accounts
2) Authenticate yourself by clicking Click the lock to make changes
3) Uncheck Allow user to administer this computer
3. Enable password protection for exiting screen saver and waking up the computer
1) Go to System Preferences > Security
2) Check Require password (…) and set the time period
4. Teach Safari to be more secure
Not all "safe" files are really safe. When Safari automatically downloads a file and unpacks it, it can serve the user almost anything.
1) Start Safari
2) In the Safari menu, click Preferences (or press ⌘,)
3) Uncheck Open "safe" files after downloading
And the bonus tip:
5. Use antivirus. Download one here. ;)
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