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Avast Security for Mac detected 100 percent of the Mac malware threats we used in our lab tests, earning it a place as one of the best Mac antivirus programs. When we started to download our zip file of malware samples, Avast quickly moved the entire folder to the Virus Chest, Avast’s name for its quarantine folder. This is impressive since most Mac antivirus software we tested stopped each individual file either during or right after they downloaded and only after the zip file was opened.

This antivirus for Mac has an above average detection rate for Windows viruses on Mac machines, which prevents you from accidentally infecting PC users’ computers through email or file sharing. And it detects threats embedded in websites and corrupted online files by using secure browser extensions.

When we first installed Avast, the browser extension in Safari was automatically installed and enabled. We needed to manually install and enable the Chrome extension, but Avast walked us through each step. Once this was done we attempted to access websites we knew were infected with malware. Avast gave us an in-browser warning, a browser pop-up warning, a pop-up warning at the top of the computer screen and a message from the extension icon. It made sure we knew just how serious clicking through to these sites was. And when we used a search engine, like Google or Bing, Avast placed a mark by each result so we knew whether it was safe to visit.

This basic Mac antivirus does come with a password manager to shield your login credentials as you access online accounts. It is also one of the few programs that include a VPN that keeps your online browsing history hidden so it can’t be logged or tracked.

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Avast scans USB drives connected to your Mac; however, this isn’t done automatically. Instead the software scans each file as you open them, which keeps viruses from infecting your computer. Also, you can protect Android phones and tablets with Avast’s mobile app, which is available at no charge if you are a registered user. iPhones and iPads can use the compatible password protector and call blocker programs for free.

This program is missing some features found in other antivirus software, including parental controls and dedicated safe banking tools. It also doesn’t have a personal firewall. Most basic antivirus programs don’t have these features, though they are often included with higher priced applications. You can check out our reviews of Mac internet security suites to learn about Mac security programs that may have these advanced protection features.

Avast Mac Security is a decent antivirus program that detects both Mac and Windows threats and extends this protection to other devices, such as cellphones and tablets, with its free mobile protection programs. It doesn’t scan USB drives as you connect them, but it does scan files as you open them to ensure hidden threats don’t infect your computer. Avast doesn’t include some advanced protection features, including a firewall or parental controls, but it does include a password manager and VPN.

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The big friendly “You Are Protected” green checkmark on Avast Security Pro’s home screen is certainly a plausible statement. The software is a rare breath of fresh air in a sea of anti-virus products that haven’t worked hard enough to keep up to date with current threats, or haven’t updated the interface to meet modern expectations of presentation and usability.

Avast is danged good at catching malware. AV Comparables says Avast detected 99.9 percent of macOS malware and 100 percent of Windows malware. In spot testing, the app did splendidly. Immediately on decompression of macOS malware from an encrypted archive, Avast detected it, deleted it, and notified me. It did as well with malicious files on the web, though it didn’t detect some items at the WICAR test site that require active local components to be dangerous. Siccing it on drives loaded with other anti-virus products, Avast found test malware I’d downloaded that had wound up in cached files that the anti-virus software on those volumes missed.

Note: This review is part of our best antivirus roundup. Go there for details about competing products and how we tested them.

Avast’s browser component, Web Shield, doesn’t seem to rely on plug-ins (there are none to configure), but uses the program’s kernel extension to check at a low level. It can be managed from the Avast app, and settings apply to all browsers.

If you’re interested in ransomware monitoring, you need to buy the Pro version ($59.99 for one year/one Mac; $69.99 for one year/three Macs; $99.99 for one year/10 Macs), which relies on folder-based ransomware monitoring. It marks the user Documents and Pictures folders as protected by default, and you can add more folders. By default, Avast allows any Apple and App Store apps to manipulate items in those folders, although you can disable those options. Any other app that tries to modify or delete anything in the shielded folders is blocked, giving you an option to whitelist it.

This is an effective way to protect most users’ critical files, but we prefer Sophos’s active monitoring approach, which looks for patterns of behavior and keeps files from being deleted than one that requires anointing folders. Still, it worked well in testing, and most users keep their most precious documents in a few locations. (Avast could expand the list to include a few more locations by default, too.)

Outside of core anti-virus features, the Pro version also offers a Wi-Fi Inspector. This is unique among anti-virus software we tested, and it looks for devices on a network engaged in malicious behavior. Other anti-virus software packaged with network monitors either whitelist local network activity, or treat it the same as any malicious Internet attacks. This seems aimed at helping users understand if they’ve joined a network, such as at a coffeeshop, that has compromised or attacking devices on it. Avast free antivirus for mac os x 10.4.11.

One negative is the soft but distinct upsell of Avast, which is sensible in its Free version, but not necessarily in a Pro. A Tools item on the lefthand navigation bar mostly displays other available products, like VPN service. A one-time message at installation might be acceptable, but mingling features and items for sale is too heavy-handed in a security product.

While you can create an account at Avast Software, it’s optional. Once created, you can use it to add machines to log in from the software for a computer to join the account. Unfortunately, the account provides no remote mangement or configuration, just reporting.

Bottom line

If you’re looking for a free anti-virus program, Avast is the best choice, edging out Sophos by providing more parity between free and paid version.

While we gave Sophos Home Premium and Avast Security Pro the same 4.5 mice rating, Sophos has a slight edge. The combination of active ransomware scanning makes it somewhat more superior to the folder-based method in Avast, while central configuration and remote control in Sophos can help for a disparate set of family or small-business users. We like Avast’s unique Wi-Fi threat detection, and its native app interface, where Sophos leans heavily on the cloud.

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