Most Mac users tend to believe their computers are proof against major security threats, particularly malware like viruses, worms, and trojan horses. Freedom in the many malware on infected websites which could turn most Windows PCs into botnet zombies is, the truth is, commonly a feature for consumers and also small enterprises. Even though this sense of invulnerability is pretty common, it is not exactly accurate. There is a fact like that because it is hard find some viruses and malware on Mac machines.
Why is that?
Creating Mac malware is more expensive since it is harder to publish (fewer weaknesses to), harder to help keep working (exploits are patched).
With all the relieve Mac OS X - the latest version with the os which could imply that high of the existing malware would not competent at running.
Also, compare to Windows users, Mac ones belong to small portion. Therefore money made from Mac malware is lesser. Think people would still target Windows simply because it turned out easier, regardless of whether which was only 5% from the world's computers? However, it is believed virus authors would squeeze effort straight into create a Mac virus since that will then open 95% with the world's computers for many years.
It is not really untrue about the fact that Mac OS is much more difficult to exploit. But it is not immune.

