Internet-based threats come in many forms these days and things will only get worse, not better. While viruses are still a very real problem, there are other types of attack which a Mac security suite can help to protect you from.

While we all think of antivirus software as something that stops malicious programs being downloaded and run, a modern security app does a lot more than that. It can warn you of dodgy email attachments, sketchy websites and some of the options here will protect other devices you use, since you probably don't use a single Mac exclusively.

But as to the question of which antivirus software you should choose for your Mac, our current top pick is Intego Mac Internet Security. However, you will find seven other recommendations below as well which may suit you better depending upon the type and number of devices that need protection.

Do Macs need antivirus?

Plenty of Mac aficionados will tell you that Apple computers are inherently secure and don't require protection. We'd argue that they are wrong - or overconfident, at the very least.

Mac threats increased by 400 percent in 2019 (compared to 2018) according to the a report from Malwarebytes. The bad guys, then, are targeting Mac users these days and they're getting smarter and greedier. As a result, cyber security is more important than ever, and good antivirus is the best place to start if you want to stay safe.

Macs are generally more secure than their Windows brethren for two reasons. On the technical side, macOS is a Unix-based operating system. As a Unix-based operating system macOS is sandboxed.

Sandboxing is like having a series of fire doors: even if malware gains access to your Mac, it is unable to spread to other areas of the machine. They are more difficult to exploit than Windows PCs, but Macs are not unhackable.

More general advice can be found in our Mac security tips; and those who have been hit by a malware attack should try how to remove a virus from a Mac.

Best antivirus for Mac reviews

1. Intego Mac Internet Security X9 Rating :

: Reviewed on: 3 July 19

3 July 19 Intego's Mac Internet Security X9 is our pick of the bunch. There's a lot to recommend: it's the fastest antivirus app we've reviews, the clean-up rate was impressing, and although it's more expensive than some offerings, you get a brilliant firewall app as part of the bundle. This is enough to justify the price as far as we're concerned, but the very budget conscious who need only malware protection might look at other apps we've reviewed. In AV-Test's March 2020 report, Intego scored top marks for protection, usability and performance, so won't slow down your Mac. You can buy Intego Mac Internet Security X9 for £20.99/$20.99 for one Mac for a year thanks to the current discount which knocks 50% off the usual price. Read our Intego Mac Internet Security X9 review.

2. Bitdefender Antivirus for Mac Rating :

: Reviewed on: 3 July 19

3 July 19 There's a whole lot to like about Bitdefender Antivirus for Mac. It's hard to argue with a 100% clean-up rate and some truly useful features at a great price. At time of writing, it can be had for half price, which is £19.99/$29.99/AU$34.99 for the first year, but the standard cost is £39.99/$59.99/AU$69.99 for subsequent years. This covers three Macs, but if you only have one, prices are even lower. UK Mac owners can buy Bitdefender Antivirus here. US Mac owners can buy Bitdefender Antivirus here. If you're in Australia, buy Bitdefender here. AV-Test's latest report gave it top marks for protection, performance and usability, and it really does do a good job at all of those things (although isn't quite as speedy at scanning as Intego Mac Security). As long as you're not averse to being shown special offers when it's time to renew, it's a great choice. Read our Bitdefender Antivirus for Mac review.

3. Norton 360 Standard for Mac Rating :

: Reviewed on: 10 July 19

10 July 19 Norton 360 is so named because it offers a lot more than just antivirus. It also comprises a VPN, firewall, password manager and clean-up tools within the one subscription price of £24.99/$34.99/AU$79.99 for the first year. If you have more Macs (or a mix of Macs and PCs) to protect, the Deluxe version covers five devices for only £5/$5/AU$10 more. The first full scan was speedy, but any further scans take the same amount of time, so Norton doesn't seem to include the functionality some other antivirus packages we've tested have that knows which files haven't changed, in order to speed things up. It managed to clean up all of the viruses we through at it, though. It also achieved perfect scores in the latest AV-Test report. Unfortunately, the Mac version misses out on some features including webcam protection, cloud storage and parental control, which are all exclusive to Windows. You can sign up to Norton 360 here in the UK or here in the US or here in Australia. Read our Norton 360 Standard for Mac review.

5. ESET Cyber Security for Mac Rating :

: Reviewed on: 11 July 19

11 July 19 The virus clean-up and detection rate of ESET Cyber Security is very good, although the scanning speed is on the slow side. ESET has also addressed the previous lack of features, adding ransomware protection, which is great to see. There’s ultimately an elegant simplicity to ESET Cyber Security that we like and we therefore can’t help but recommend you at least include it on your shortlist You can get ESET Cyber Security for £29.99 for one device for one year. Of course, you can choose to protect more than one Mac by adjusting the number of devices (and the length of the subscription) at the checkout. The cost per device is then considerably less. If you're based in the US, you'll find ESET available for $39.99 here and in Australia for $49.99 here. Read our ESET Cyber Security for Mac review.

6. Sophos Home Premium for Mac Rating :

: Reviewed on: 3 July 19

3 July 19 Despite the long full-scan times, there’s a lot about Sophos Home Premium to make up for it. It’s definitely worth a look - and considering you can start with the free version and upgrade to the paid version later, what have you to lose? At time of writing, a year’s subscription to Sophos Home Premium is £37.50/USD$45, after which it'll go up to £50/$60 per year. This is good value for what you get, and lets you protect up to 10 Macs and PCs. Plus, if you commit for three years the discount goes up from 25% to 45%. You can get Sophos Home Premium here. But the best news is that if you merely want antimalware protection - including realtime protection - then Sophos Home Free is all you need. You get the same cloud-based remote management for up to three Macs or PCs as with the paid-for product. You simply don’t get some of the other tools, like ransomware protection. To our knowledge, Sophos is the only firm offering free antivirus for macOS that includes always-on protection. Other free apps merely let you scan your system on-demand. Read our Sophos Home Premium for Mac review.

7. Airo Antivirus for Mac Rating :

: Reviewed on: 7 February 20

7 February 20 Airo is a new name in Mac malware protection and focuses on macOS solely. As such it claims to offer the best-looking Mac antimalware apps around, and the folks behind it say it also utilises AI in the form of machine learning to stay ahead of new threats. It has a pleasant, polished feel, and malware detection is good. Its missing some extra features like firewall, ransomware and phishing protection, though. Airo has opted for a VPN-style billing method, so subscribing for two years will give you the biggest discount, of 69%. It means you'll pay £74.99/$74.99 upfront for 24 months' protection for one Mac. You can sign up here. Read our Airo Antivirus for Mac review.

How to choose Mac antivirus

Features fundamental to all packages are two ways to find viruses: on-demand protection and via always-on protection. The former finds viruses by examining one file after another during scheduled scans, or when you choose to undertake a scan, perhaps because you’re worried your Mac might be infected. The speed at which the antivirus app can do this is important, because some take a long time and also hog the Mac’s CPU while they do so. Waiting six hours to find out if your Mac is infected is neither convenient nor relaxing.

Always-on malware protection is what protects the user outside of the times when scans are run. If some malware arrives on the disk, perhaps via an email or a downloaded file, then the always-on protection should be able to detect it and either quarantine it (copy it to a safe folder so the user can decide what to do with it), or simply delete it. Usually a notification is shown when malware is detected in this way, but not all antimalware apps show the same amount of explanation of what’s happened - and this was one of the factors we examined in our testing.

Outside of direct malware detection, many security suites include additional tools such as ransomware protection. Ransomware is a new kind of malware that, once it’s infected a computer, encrypts all the user’s files and then demands a fee to decrypt them. To protect against this infection, anti-ransomware features typically block any app from writing to a user’s home folders, such as Documents or Photos, unless the app’s preapproved (a process called whitelisting). Lots of apps come already preapproved, of course, such as Microsoft Word, or Apple’s own Photos app. But you can add others.

Several products also include virtual private network (VPN) add-ons. These protect an internet connection by encrypting it, and this is useful when utilising unsafe open WiFi such as that provided by a café or hotel. In our experience, these are not replacements for separate paid-for VPN services as many do not unblock video streaming services and some are cut-down versions which constantly nag you to pay extra for the full, premium versions.

Web protection via browser plugins or extensions is also popular and aims to stop the user (or their children) doing anything they regret online, such as visiting dodgy websites or handing over personal information.

There are usually different options from each vendor, and you get more extras with the top packages. They might include password managers, parental controls, cloud storage - the list goes on. Generally, the underlying antimalware engine is the same in all products from the same company, so you can save money if you don't need those additional features.

And price was an obvious factor in our test. All the antivirus apps are sold as yearly subscriptions. That’s right, you can’t just pay once and use forever. Often there’s a hefty discount for that first year’s subscription, but this can burn you when automatic renewal occurs a year later and the full retail price is charged- often 100% more. Alternatively, you can purchase several years’ subscriptions at once, receiving a discount.

Many subscriptions allow you to install the software on more than one computer (including Microsoft Windows computers), which can sometimes add significantly to the value - all computers, phones and tablets within a household can be protected with one subscription.

How we tested

For various reasons, quantitively testing antimalware apps is difficult to the point of near-impossible, and for this reason the results of our testing are intended to be indicative rather than definitive.

For example, we ran a full scan using each app and our goal was to determine relative speed and CPU loads. One app scanned the system in 30 minutes, while another took six hours. Your own scans might be quicker than this, or take longer. However, it’s clear that the former antimalware app has a faster scanning engine compared to the latter.

This is the kind of difference we hoped to identify.

The full scans were run on a MacBook Pro running macOS Mojave with an i7 2.8GHz CPU, 16GB of RAM and 512GB flash-storage based disk, around 400GB of which was occupied. This Mac effectively has eight CPU cores—four actual cores, and four hyperthreaded virtual cores. This Mac is used daily for tasks such as email, web browsing, watching movies, listening to music, and more. As such, it’s very much a typical system.

In order to test always-on malware protection for each app, we downloaded 26 malware samples from a Mac security site representing most malware targeting the Mac from 2018 until the first quarter of this year. Because placing these onto a "live" system represents an obvious security risk, we unleashed them within a virtualised Mac running on VMware Fusion, with macOS Mojave installed. This VM was assigned four CPU cores, plus 8GB of RAM, so represents an average Mac system.

Notably, we did not actively infect the system with this malware. This is generally impossible because of Apple’s Xprotect technology that’s built into macOS that blocks the majority (if not all) malware for the Mac.

Instead we simply placed the malware sample files on the disk by extracting them from password-protected archives. This was enough for most malware apps to respond and either quarantine or delete the malware files, and was enough to test the extent of each app’s malware database.

If an app didn’t catch a particular malware sample, we checked the VirusTotal database for more information. VirusTotal is an open project intended to act as a freely-accessible information repository covering most malware and antimalware apps.

Our goal was to find if the antimalware app claimed to defend against any malware that it ignored. We found that in most cases it did indeed claim to do so.

So, what’s going on? Perhaps it’s this: we tested the Mac version of an antimalware app, and there are likely to be Microsoft Windows, Linux and even Android versions of that app. The Mac version might have a weakness in that it can’t spot that malware, even though it should.

Alternatively, it might be an issue with our particular sample of that malware - although we note that some antimalware apps we reviewed got a 100% detection and clean-up score, so claiming it’s “the wrong type of malware” is perhaps a weak excuse.