All Mac fans have heard it at some point in their life - one of the many little pieces of misinformation about Macs that seems to have permeated nearly all of the Windows PC-using crowd: the idea that Mac OS is free of viruses and other malware simply because of its (supposedly) incredibly miniscule marketshare. In this post I intend to explain why this idea is false for the most part and also prove that Mac usage is on the rise.
First of all, let’s assume that the mass opinion is correct and that the Mac has an incredibly small user base - most estimate the number to be about 4% or 5%. According to security through obscurity, the reason that there is no malware for OS X is because malware writers have little or no interest due to the small number of Mac users that could be infected, as well as the malware writer’s lack of knowledge of the Mac OS. While this may hold some validity, I honestly don’t believe that this is their primary reason. With all of the Mac userbase boasting their immunity to the sea of malware on the internet and even Apple now leveraging it in their advertising campaign, don’t you think that a malware author would be heavily enticed to write a massive worm or virus that swept across and devastating the Mac userbase? The resulting media surge would award the writer a massive amount of fame and possibly a nice position in a large security company or even Apple itself. The motivation is there, but Mac OS X is simply a significantly harder nut to crack than Windows is, mostly thanks to its heavily multiple user-oriented design. Any such malware would have to rely solely on the user entering his name and password, and thus human stupidity to spread, which simply isn’t reliable enough to get the desired results.
Now I will address the issue of Macintosh marketshare. Before I go further, the reader must understand the difference between marketshare and and install base:
Marketshare: The number of units sold in a given time period. Said time period is usually measured in quarters.
Install Base: The number of units in place and currently in use.
Marketshare is not as important as it is made out to be. It’s simply a measure of how popular something was in a given quarter and only adds to the install base. If we are looking for solid numbers for platform usage, install base would be a much better place to look. According to this link, the Mac install base is estimated to be at 22 million even before Leopard’s release. Some estimate that this represents a total of 16% of all computer users. That number is nothing to sneeze at, and that number will only increase with the release of Leopard. It’s certainly not the miniscule number that so many seem to think it is.
Even if marketshare really is that important to you, even that is on the rise. According to marketshare.hitslink.com, Mac marketshare is sitting at about 6.61% worldwide, which is higher than it has been in previous years.
So in conclusion, yes, obscurity does play some part in the Mac’s lack of malware. How much of one is truly questionable, however, seeing how the number of Mac users is quite decent and is increasing every day. If it’s security through obscurity you’re looking for, try Linux. The home marketshare for it is currently sitting at about 0.81%.