What is the recommended Mac free antivirus software I actually used?

Updated : Nov 23, 2021

As for free antivirus software for Mac, there used to be a standard software called Sophos in the past, but it is no longer open to the public.

So, I tried using all the free antivirus software that is often talked about on the net, so I will introduce which one is recommended.


What kind of antivirus softwares are now available for Mac?

a) Install & resident monitoring type

It is a type that installs antivirus software on Mac and monitors and removes virus intrusion in the background while using Mac.

Since it is constantly monitored, there is a disadvantage that the operation of the Mac may become slow (in some cases), but there is an advantage that virus infection can be monitored in real time.

Paid software includes “Norton” and “Virus Buster”, which are the most orthodox types.

Mr. Otter

This page introduces this “a) Install & resident monitoring type”!

b) Install & occasional scan type

This type requires the user to run the antivirus software to install it on a Mac and search for and remove viruses occasionaliy.

Compared to the “a) Install & resident monitoring type”, there is no disadvantage that the operation of the Mac is slowed down, but there is a disadvantage that it is not possible to respond quickly to virus infection.

Free software such as “Bitdefender” and “Malwarebytes” are famous.

‎Bitdefender Virus Scanner
‎Essential security for your Mac! Bitdefender Virus Scanner finds Mac malware as well as Windows vi...
Mac Virus Scan | Mac Antivirus and Anti-Malware
Malwarebytes Antivirus for Mac scans & removes viruses, adware, ransomware & other Mac malwa...


c) Browser add-on type

It is installed as an “extension (add-on)” for Google Chrome and Firefox.

If you may load virus-infected sites, they can prevent yourself from being infected with the viruss.

But you cannot prevent the SSD / HDD in your Mac from being infected with the other viruses.

Therefore, I will not introduce this type on this page.


From here, I will introduce each software of “a) Install & resident monitoring type”.

① Avira Free Antivirus for Mac

Download link

Avira Free Antivirus: Download free virus protection
Download Avira Free Antivirus for free! ✓all popular operating systems & smartphones ► Protect y...


  • Installation target is macOS 10.14 High Sierra or later only
  • German company
  • Multilingual




② Sophos Home Free

Download link

Antivirus for Mac - Premium Mac Antivirus Software | Sophos Home
Sophos Home Premium for Mac provides antivirus protection, advanced malware security, and much more....


  • Email address required for download and installation
  • Since setting changes and scanning operations are performed with a WEB browser, it cannot be used unless it is connected to the Internet.
  • The application is multilingual, but the main screen used for changing settings etc. are only English.


Change the settings and execute the scan with a web browser as shown in the screen below.

When you open this screen, you need to log in to the Sophos site with the user ID you created with your email address, so you can’t see it unless you’re connected to the Internet.

Sophos Home Freeのメイン画面

How to uninstall

  • To uninstall, you need to use a dedicated tool
  • Below is an article on how to uninstall
Service and Support
  • Below is an article on a dedicated uninstall tool (You need to agree “End User License Agreement & Privacy Policy” before download it.)
End User Terms of Use & Export Compliance
Sophos export compliance check
Sophos uninstaller

Sophos uninstaller icon


③ Avast

Download link

Avast | Download Free Antivirus & VPN | 100% Free & Easy
Join 435 million others and get award-winning free antivirus for PC, Mac & Android. Surf safely ...


  • If you change the settings, you will be directed to the paid version (cancellation is possible)
  • Multilingual





Download link

Download Free AntiVirus for Mac | Mac Virus Scanner | AVG
Download FREE AVG antivirus software for Mac. Protection against viruses, malware & spyware. Eas...


  • If you change the settings, you will be directed to the paid version (cancellation is possible)
  • Only English version




Conclusion : Which antivirus software do I recommend you after actually using all?

Impressions after using for 3 days

Cool Cat

It’s been a few days since you’ve used them, but what are your impressions?

Mr. Otter

I don’t like “② Sophos Home Free” anyway.

When I try to open the setting screen, the browser opens, but it takes tens of seconds (experience) until the contents are displayed, which is frustrating.

What’s more, I was asked for my email address to download and install, and I needed to log in with my email address to open the settings screen.

In addition, I was asked to email address when I downloaded the uninstall-only tool.

So I uninstalled it at the speed of light.

Cool Cat

Then, what about the remaining three?

Mr. Otter

I don’t like “① Avira” too.

Because I installed it in my 2015 MacBook, but it took 24 hours for the first full scan.

The CPU of this MacBook is outdated Core 2 Duo, but it’s all too slow.

Cool Cat

Does that mean that the remaining “③ Avast” or “④ AVG” was good?

Mr. Otter

Yeah, both were just as good.

Suffice it to say, “④ AVG” was a little lighter to operate, and “③ Avast” is multilingual, so there are advantages and disadvantages.

Cool Cat

So the conclusion so far is “③ Avast” or “④ AVG”.

For the time being, let’s continue to use “③ Avast” and “④ AVG” as the main, and then continue to use “① Avira” as a wait-and-see.

So let’s see what’s going on and add anything if anything happens.



Reference information

Macにおすすめの無料ウイルス対策ソフト│性能で比較 2023年



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