When your Mac starts behaving strangely and not as it usually does, it makes you wonder whether it might have some sort of malware on it, such as a virus, Trojan or even a type of adware. It is rare for Macs to be infected, but it is not unknown, so when my Mac started playing up, I had to check it out and downloaded ClamXav.
Could your your Mac part of a malware botnet? There is a new type of malicious software infecting Apple Macs and there is a chance that your computer could already be compromised. Reports say that only 17 - 18,000 Macs have been infected, so it is nowhere near as widespread as the Flashback worm that infected 600,000+ Macs a couple fo years ago, but it is still a worry. Here's how to check whether your Mac is OK.