Absolutely not. Here’s why!
Apple devices are slightly harder to weasel into from outside, but that doesn’t mean that it’s impossible. A virus has to be crafted differently to even function on an Apple computer. For the same reason that Apple needs its own version of browsers and games, it needs its own version of viruses, and with Microsoft being the default for most ‘sensitive’ systems, like pharmacies, school networks, and hospitals, hackers and other malicious individuals just don’t seem to care that much about Mac devices.
But not caring that much is not the same as not caring at all.
Apple’s known virus count is slowly creeping up, although viruses that use weaknesses in the system to get in are quickly made obsolete by updates. Apple viruses are a special kind of pain to deal with because the person who made them surely made them out of spite – as said previously, Mac’s system is not compatible with Microsoft’s, so viruses are custom tailored.
Their recommendation is to completely avoid third party apps – for good reason. The primary way that malware ends up in the computer’s system is via scam downloads. Those can look like a couple different things. Everybody (or almost everybody) knows not to click those flashing banners at the top of blog sites that advertise “FREE iPAD! CLICK NOW!” because it used to be the most common way to steal information from non-tech-savvy people.
“Free Flash Player!” “Free Game! Connect With Friends! Download Now!” are it’s equally outdated cousins. Anything that tells a Mac user that they need to download it has the potential to be a virus, and if the user is unlucky enough to get a virus prepared for a Mac, they’re in for a headache. But it’s tough to trick people with those flashing banners anymore, right? So…
The next easiest way is to fake an email from an app publisher, or even from Apple itself! This still won’t get a lot of people, but the people who fell for the flashing banners the first go-round might fall for an email that looks juuuuust official enough to make them doubt themselves.
One version of this scam involves sending an email with a downloadable attachment to ‘fix’ a ‘virus’ that ‘Apple’ has detected on the device. That’s not Apple, and there’s no virus until the recipient downloads the attachment. That was the goal! And now the virus is on the computer. Oh no!
Alternatively, if you’ve downloaded some game or another that you trusted, even though it was third party, and then received an email about a big patch that needs to be downloaded, you might fall for it! Depending on the game, they could have your email to send patches to, right? Official platforms like Steam certainly have their user’s email.
And that’s not even the game download itself! Downloading a game off of third party websites can lead to some nasty results, which is why Apple goes out of it’s way to warn you every step of the download, and also warn you off of third party downloads in every help forum. The risk that what you downloaded could be malware is just not worth the inconvenience of waiting for that game to come out on an Apple-licensed platform.
Long story short: it’s very possible, albeit difficult, to get viruses on a Mac computer. Don’t download attachments from strangers!
Source: Apple.com resources