But be aware that the Internet is riddled with potential threats to the security and well-being of your Mac or iOS device. No computer system is completely immune from possible attack, but Apple’s OS X (being Unix-based) is less vulnerable than most, particularly the latest versions from Lion onwards. The following seeks to offer some guidance on the main security threats and how to avoid them.
If you have further questions please post in the forum appropriate to your particular hardware or operating system. There are many forms of ‘Malware’ that can affect a computer system, of which ‘a virus’ is but one type, ‘trojans’ another. Using the strict definition of a computer virus, no viruses that can attack OS X have so far been detected 'in the wild', i.e.
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In anything other than laboratory conditions. The same is not true of other forms of malware, such as Trojans. ( The expression ‘malware’ is a general term used by computer professionals to mean a variety of forms of hostile, intrusive, or annoying software. Not all malware are viruses.) Whilst it is a fairly safe bet that your Mac will NOT be infected by a virus, it may have other security-related problem, but more likely a technical problem unrelated to any malware threat. Since the introduction of Snow Leopard, Apple OS X has an anti-malware system built-in known as XProtect but officially called File Quarantine (see here: ), which may alert you to, and prevent installation of, certain forms of malware.
Later versions of OS X include further features to protect you, about which here: and Apple also recommend that you take simple steps to protect your Mac as detailed here: So what other anti-virus software do I need (or if I am still running Tiger or Leopard)? Whilst viruses designed to attack the Microsoft Windows operating system cannot affect Apple OS X, it is possible to pass on a Windows virus, which you may have received but not noticed, to a Windows user, for example through an email attachment. Many use the free ClamXav just to check incoming emails for this reason. Our resident expert Thomas A Reed offers excellent guidance on this subject here: www.thesafemac.com/mmg Do not install Norton Anti-Virus on a Mac as it can seriously damage your operating system. Norton Anti-Virus is not compatible with Apple OS X.