Should I Worry About Spyware on an Imac?
Spyware and other malicious software, known as malware, is not a concern for most iMac computers. Your iMac's operating system contains security software to protect you against malware, meaning that you don't need to add third-party anti-virus and anti-spyware programs. However, your iMac is not safe from all threats: use caution to avoid infecting your computer with spyware.
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Updating
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Your iMac most likely runs a version of the Mac OS X operating system, which has built-in anti-spyware protection. Even if you don't operate the latest full upgrade, such as Snow Leopard, Lion, and later versions, make sure that you have the latest updates for your version of the operating system. Click the Apple icon in the upper-left corner of your screen and choose "Check for Updates," then install any updates that your computer finds. Update your system regularly to keep up with evolving spyware software.
How Spyware Works
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Spyware accesses your computer's personal data, exposing it to others. To do this, the spyware must get into the areas on a computer in which your personal data is stored. Mac operating systems are designed to restrict this access. For this reason, you generally don't need to worry about spyware on your iMac as long as your system is up-to-date. However, hackers are constantly looking for new ways around security systems, so it pays to be careful even on an iMac.
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Download with Care
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Your iMac's native Web browser, Safari, scans every item you download for malware and warns you if it detects any such software. The iMac's built-in Mail application also scans email attachments for email-based spyware infections. If you use a different Web browser or email application, it may not support these anti-malware measures. The best way to protect your iMac is to avoid downloading any file from the Internet unless you trust the source.
Known Threats
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A specific Mac-targeted spyware program known as "OpinionSpy" began infecting Mac computers in 2010. This spyware targets personal information stored in your browser and other applications; it cannot, however, access personal information on your hard drive. Users get this virus by downloading malicious software attached to screen savers or conversion software. Another, somewhat misleading, threat to iMac users is the "MacDefender" software. This software pops up a message on your iMac when you're browsing certain sites. The message says that your computer is infected with malware and encourages you to purchase the MacDefender software. This software is a scam, as is the message about a virus or spyware on your computer.
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References
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