If you only get software from the Mac App Store, these apps are not only pre-vetted for safety, but also include sandboxing internal walls which prevent malware from exploiting any weakness in the software. This includes email-based phishing attacks or browser-based cross-site scripting or man-in-the-middle attacks. It has nothing to do with market share. Some have reported issues with Norton on their Macs while others say it runs flawlessly. But, Mac users need to not make the mistake of becoming cocky about this. Like Java, Flash is in well-deserved decline, but Flash content is still much more widespread than Java content on the Web. Delete any such file without opening it.
All Macs have a set of inbuilt malware protections. Yes, malware can be avoided by practicing safe computing. Mac users are not automatically immune from the threats of the Internet, and users still must practice safe browsing habits. Keep Your Apps and Operating System Updated Almost every app or operating system update made by Apple or third-party developers includes security updates. A negative result is no proof of anything, for the reasons stated above. For the reasons given, App Store products, and—to a lesser extent—other applications recognized by Gatekeeper as signed, are safer than others, but they can't be considered absolutely safe. At this point, I personally fall on the side that says they do more harm than good at this point.
This could potentially allow those viruses to be unknowingly distributed to Windows computers. The performance hit of a program like ClaimXav should not be that great on any modern Mac — and if it is you can just take it back off. Now that the market share has grown significantly, the number of viruses has decreased to zero, and the only malware in the wild is a handful of Trojans, which are easily avoided. Not responsible for typographical, technical, or descriptive errors of products herein. Be safe and use an anti-virus package, to do otherwise is just ignorant and arrogant. The marketshare myth has been debunked more times than I can count. Only a few outmoded sites still use it.
I've tested those extensions and found them safe, but you should always do your own research before deciding whether to trust any third-party software. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. The greatest risk in this scenario is the person operating the computer. There are no true viruses for the Mac in the wild. If you surf websites that would be run by people who like to shirt the usual society ethics standards, you are at higher risk of infection.
So why do so many people have burglar alarms? Macs certainly can get viruses, and Mac-specific viruses and malware do exist. Everything is managed by visual elements like buttons, collections, lists, icons, leds. Even if you don't get the alert, you should still delete any download that isn't what you expected it to be. Those lapses don't involve App Store products, however. As clearly stated in that article, that exploit has never appeared in the wild, so it presents zero threat to Mac users. You can use an antivirus app if you want. You can use an antivirus app if you want.
They have to be to do their job. Sadly, many people still forgo updating their operating system or apps to the latest and greatest versions. If they acted in a responsible way, I just might trust them. It has nothing to do with market share. Also ignore any attempts to upsell you to a paid version of the product. If you have a tech question, please check out! And for the two old Mac Pros I have, that work great.
It has already been proven that safe computing will protect Mac users, even when antivirus apps fail to do so, as has happened in the past. Provide the information they seek and woe is you in the form of a drained bank account or massive credit card bill. It notifies you if it finds malware, but otherwise it has no user interface. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. As I said, Macs are not immune to security breaches.
In that time I have had only one or two instances of a virus or malware infection. A genuine alert that Flash is outdated and blocked is shown on. The comment is long because the issue is complex. Java is, among other things, a platform for running complex applications in a web page. Macs don't get viruses because they have such a small marketshare. And while Macs are rarely targeted by viruses, it pays to be careful.