Hmm, yeah well

Now computer safety is a hot topic, especially since there those nice ads which imply or support certain believes concerning Mac and Windows PCs. Before I continue both Mac and Windows systems are PCs, Personal Computer is what PC stands which encompasses all computer systems that are such.
Now interestingly enough it was actually a Virus that attacked Macs that was the first Virus out there and that was because at that time in the market of the personal PCs the Mac OS was leading. A lead which Mac has lost for a long time, that is not because Windows is inherently better but because Windows had a better ad Campaign not to mention aimed at the right user group in the right manner. Mac has simply become more of a tool for a very specific purpose with which there is nothing wrong. But the Windows machine and most Linux machines can easily be upgraded while it is admittedly harder to find drivers that work well for some version of Linux. Also the Windows machine as the Linux machine are both more versatile for example you can custom build your own computer legally and install your old OS from the old machine on there and simply stop using the old set-up while a Mac has to be bought with the computer something that naturally makes it less attractive for the people that build computer systems. Then there are other past time activities for which Windows is most suitable such as gaming and the likes, now Macs are most useful for Graphic and Sound Design an area in which I might add Windows and Linux machines can not compete. But that means that the Mac is the most useful to people that simply want to do either of those things. In the other areas it is just as good as Windows or Linux, while Linux offers more flexibility to the advanced user but often is confusing to the beginner. Windows is fairly simple, offers versatility which allows it to be used for internet and other work related issues as good as the other two and also allows the user to play games which by now are a very important part of the industry. Macs simply are not better as a general statement but rather cater to the needs of a special group which needs something like that. But for other purposes that involve work All systems are equal now, a corporation is under those condition most likely to be the OS that comes it the cheapest and if the corporate IT people know that the best choice is an OS that allows upgrades to come from them because it will be cheaper then they only have Linux and Windows as choice and most people know Windows because it is on most computers sold why? Because they managed to become popular enough. Thus Windows is the logical choice. Now if Mac was the cheaper choice you can bet that Companies would start using Mac but as long as they have to buy entire systems with the OS it makes little or no sense to use Macs.
To the most contested issue of hacking/viruses and spam, Unix based systems (Linux and Mac) are known to be safer then Dos based (Windows), but it is also known that there is no such thing as a totally safe system Macs and Linux machines can be hacked but you have to remember that hackers and spammers go after the most common OS since that is what brings them the most information and Victims which either results in fun or money or even both. If say mac would have the greatest market share tomorrow within a month the internet would be swarming with Spam and Viruses for Mac and hackers would suddenly start taking an interest in Macs.
But since Macs are a small group they have remained fairly safe for the time being.
Thus saying Macs are safer because they are is not perse the entire answer but rather they are safer because they represent a minority and that means that Windows is actually protecting Macs by being the main target.