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avast! free antivirus for Mac offers three shields and on-demand scanning. Our Web Shield and Mail Shield combine to check the vast majority of incoming data from the Internet, while File Shield scans all programs stored and executed from your hard drive. Everything is packed in a brand new GUI and is now available as a public beta.


  • On-screen alerts
  • On-demand scanning
  • Web Shield, Mail Shield, File Shield
  • Automatic virus definition updates
Please note that avast! will not run properly if you have other antivirus software installed.

What's New

Version 9.0:
  • New (and much nicer) main UI.
  • Added command "Scan with Avast!" into Finder's context menu
  • Preferences has moved from System Preferences into the main application (menu Avast > Preferences)
  • No user registration required.
  • Complete support for 64bits. (In version 8.0 the antivirus engine was still running as 32bit for historical reasons.)
  • Many structural changes and fixes more...


  • OS X 10.6.8 or later

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avast! Free Antivirus User Discussion

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Most Helpful Reviews...

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from x0x0

Beware that when Webshield is enabled (default), Avast! forwards all your connections through a proxy of their own; Every site you connect to is therefore logged by them; Everytime you open the software, even when you install it, it connects and more...

11 people found this review helpful
Version 8.0
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MichaelR3935 Member IconReview+4

If you have fast ssd drive, this program can change it to very, very slow!!!

Reply0 replies
Version 9.0
Hal2007 Member IconComment+214

There seem to be downsides, too.

Be cautious about Avast installing adware.
Read this article for more information:

Reply0 replies
Version 9.0
tjekov37 Member IconReview+45

Slowing down my iMac 13.1. After uninstall , he going work so fast !!!

Reply0 replies
Version 9.0
tjekov37 Member IconReview+45

What's new in v 9.0 ??

Reply3 replies
Version 9.0

-New (and much nicer) main UI.
-Added command "Scan with Avast!" into Finder's context menu
-Preferences has moved from System Preferences into the main application (menu Avast > Preferences)
-No user registration required.
-Complete support for 64bits. (In version 8.0 the antivirus engine was still running as 32bit for historical reasons.)
-Many structural changes and fixes under the hood for higher stability and performance.
-New major versions of browser avast! Online Security plugins bundled.


The UI is indeed MUCH MUCH nicer! No preference pane in system any more is good, 64 bit support is even nicer. All in all: Thumbs up!


thanks for the release notes, tjekov37, where did you find them?

BigJohnson Member IconComment+171

In Jan. 2014, more than 20 Mac anti-virus apps were tested and Avast came in second place.


Reply7 replies
Version 8.0

Based on that comparison I uninstalled ClamxAV and installed avast!

There's a whole lotta BS to go through to get this for free!
After installation a window opens and asks to "Install Google Chrome as my default browser." The box is already checked!

So I unchecked the box and moved on. To use this app you must register on their website. When I clicked the Register button, a window popped up saying "Your avast! antivirus expires in 30 days." This angered me and I would have immediately uninstalled avast! if I hadn't previously read a review below that says avast! is free for a year. There's no explanation given in the window but evidently I must manually update or do something every 30 days to keep it activated. I registered an account I don't want and the app now shows 365 days remaining.

Well if I have 365 days left, why did the window say it expires in 30 days? WTF?!

This should be fully explained BEFORE installation! It SHOULD be noted above in the description. This is an underhanded and unscrupulous practice.

Avast! Free is not completely free - it takes up your time initially when you register, then every month throughout the year. And evidently it wants your soul too, by attempting to force you to install Google Chrome.


Thanks, I was about to try Avast but after reading your warning, I decided on Avira.

One reviewer also mentioned that both Avast and Sophos are incompatible with 1Password and Little Snitch, but Avira works fine with them. It's due to the internet shield feature, which you don't need so much if you install the right extensions on your browsers and use Little Snitch.


1. Chrome installs are sneaking in all over the place -- along with home page, search engine changes, and "share your experience" permission. Ya gotta watch and pay attention, instead of auto-clicking "next" on installers.

2. Regarding the expiry thing -- 30 days is what they give you up front. After that annual registration is required to maintain it. Just guessing that it is their way of tracking how many are actually using their program.

In the Win world, personal use has no personal support (beyond forums) -- you ride the commercial and government services that actually pay for it.


I have 1Password and Little Snitch, and I've found no conflict whatsoever with avast!.

However, I have Web Shield disabled in avast! yet it's still active - there's a button in my Safari toolbar, and it displays a green icon briefly over every page I load in Safari. It doesn't do that in Firefox.

I have a bug report filed and am waiting for a reply. I had uninstalled avast! shortly after the first installation, then reinstalled yesterday to work with support on the inordinate number of connection attempts that avast makes to google (blocked with Little Snitch).

When the installer opens it immediately tries to connect to google-analytics.I.google.com.
When the install is done a window opens asking to install Chrome as the default browser.
While that's open com.avast.proxy tries to connect to google-analytics.I.google.com.
Then avast! tries to connect to google-analytics.I.google.com.
When I started scanning my drive, com.avast.ciqstatsend tried to connect to mciq.avast.com. Looks like it's trying to send info about my usage.

I think there were two more attempts that I didn't take screenshots of.
I'm guessing avast! is compensated by Google for allowing it to spy on users' systems, and for each user who installs Chrome. Why else the close bond between avast! and Google? Guess that's the price for this "free" app, but is easily thwarted with LS.

I have requested a way to limit the amount of CPU usage required when scanning. I took a screenshot of avast! using 132% CPU, and it was over 100% quite often during it's 4 hour+ scan of my 500 GB drive. That caused my system to be very sluggish, virtually unusable at times.

Other than all that it seems to functioning okay and I get a small popup in the corner of my screen to let me know when virus definitions have been updated.

I just opened avast! and got another connection attempt. This one from avast! to program.avast.com using port 443. That could be avast! trying to connect to my account, but if so why didn't it try during the first scan?
That one will try to connect every time avast! is opened, so it needs to be permanently blocked or allowed with Snitch. I blocked it, I'll see if this affect performance and change if necessary.


Found out why the Internet scanner was active even though I had Web Shield disabled.
Avast! installs an extension in Safari which I didn't know about until support contacted me. But it has a MAJOR bug - it's impossible to get rid of! I uninstall the extension and every time I reboot it's back again! I've made absolutely sure it was removed from the Safari extensions folder, but on reboot it comes right back. Waiting for another reply from support.



MY BAD - there's no bug, but the browser extensions must be uninstalled from within the Avast! app, not from the browser extension window like other extensions.


But "Intego" is the best and number-1 in this test !!!! ;-)

Oysterhaven Member IconReview+22

Latest test results. Best to download and read.


Reply1 reply
Version 8.0

According to those tests, Avast! is still the best FREE anti-virus app, though it lagged far behind VirusBarrier, finding only 58% of the samples.

Heck, even Avast!'s forums were hacked last month, so how good can their security really be?

tjekov37 Member IconReview+45

Where i can view OSX treat ? Like that....

Reply0 replies
Version 8.0
Gregm Member IconReview+215

Calls home to the Feds? WTH? Additional connectivity problems

I shifted from Sophos to this because of the ratings referred to by an earlier poster. Note that that comparison chart is *NOT* for Macs -- you need to dig deeper to find out the Mac info is just-inherited-4year-old info, not yet updated.

Little Snitch said a helper wanted to connect to redirect.gov1.com. Chased it down with Whatroute to a server shared with LAX, Moffet AFB and ??

I uninstalled it and all my secure connectivity problems went away.

Reply1 reply
Version 8.0

LOL, Avast is NSA Spyware. I thought they already had backdoors into every major OS. Maybe Avast is a trial run of something more intrusive?

x0x0 Member IconReview+16

Beware that when Webshield is enabled (default), Avast! forwards all your connections through a proxy of their own; Every site you connect to is therefore logged by them; Everytime you open the software, even when you install it, it connects and sends your infos to Google Analytics; It installs a browser plugin that also connects to Google Anaytics. It uses Curl (a system process) to send analytics info to their servers... In facts, it does many things a good malware shoud do. And if it was labelled as so, I would rate it a 5-Stars.

Reply0 replies
Version 8.0
mayax Member IconComment+8

Get the latest AV detection comparison chart here:


I keep wondering if my AV is good enough, and every now and then check macupdate to see what users are recommending; but never know who or what to believe. Anyway, I came across this website and thought I'd share it with people that would like a more conclusive update and comparison between numerous AVs.

Reply0 replies
Version 8.0
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Version 8.0
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Version 8.0
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Version 7.0 build 37264
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Version 7.0
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Version 1.0
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Version 3.11
> 3 32


Current Version (9.x)


Downloads 36,968
Version Downloads 1,615
Type Utilities / Virus
License Free
Date 02 Jul 2014
Platform Intel 64 / OS X
Price Free
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