If you own an Apple computer you MUST read this!
Beware there is a bogus antivirus program call “MAC Defender” that targets Mac OS X users running Safari. The program runs a fake Windows virus scan animation and tells you your computer is infected. It runs a real Mac installation program and asks for your administrator password. Once installed, it makes your computer act like it really is infected, opening offensive websites and generally misbehaving. Then it offers you a 1-year, 2-year or lifetime protection, and steals your credit card number if you buy the protection.
What can you do?
Only download programs from a trusted source, such as the Apple App Store. Never give up your computer password, social security number, or credit card information. In Safari Preferences uncheck the box “Open ‘safe’ files after downloading”