Free Antivrus for Mountain Lion.
Can anyone please direct me to a free antivirus programme for Mountain Lion? I have tried searching AVG to no avail.
iMac, OS X Mountain Lion (10.8)
Apple Event: May 7th at 7 am PT
Can anyone please direct me to a free antivirus programme for Mountain Lion? I have tried searching AVG to no avail.
iMac, OS X Mountain Lion (10.8)
2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files, and to block insecure web plugins. This feature is transparent to the user, but internally Apple calls it "XProtect." The malware recognition database is automatically checked for updates once a day; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.
The following caveats apply to XProtect:
Gatekeeper doesn't depend on a database of known malware. It has, however, the same limitations as XProtect, and in addition the following:
4. When you install the Apple-supplied Java runtime (but not the Oracle runtime), a third layer of protection is added: a "Malware Removal Tool" (MRT). MRT runs automatically in the background when you update Java. It checks for, and removes, malware that may have evaded the other protections via a Java exploit (see below.) Like XProtect, MRT is presumably effective against known attacks, but maybe not against unknown attacks. It notifies you if it finds malware, but otherwise there's no user interface to MRT.
5. Beyond XProtect, Gatekeeper, and MRT, there’s no evidence of any benefit from other automated protection against malware. The first and best line of defense is always your own intelligence. With the possible exception of Java exploits, all known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and the malware attacker. If you're smarter than he thinks you are, you'll win.
That means, in practice, that you never use software that comes from an untrustworthy source. How do you know whether a source is trustworthy?
7. Never install any commercial "anti-virus" or "Internet security" products for the Mac, as they all do more harm than good, if they do any good at all. If you need to be able to detect Windows malware in your files, use the free software ClamXav — nothing else.
8. ClamXav doesn't have these drawbacks. That doesn't mean it's entirely safe. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so will corrupt the Mail database. The messages should be deleted from within the Mail application.
A Windows malware attachment in email is usually easy to recognize. The file name will often be targeted at people who aren't very bright; for example:
♥♥♥♥♥♥♥♥♥♥♥♥♥♥!!!!!!!H0TBABEZ4U!!!!!!!.AVI♥♥♥♥♥♥♥♥♥♥♥♥♥♥.exe
ClamXav may be able to tell you which particular virus or trojan it is, but do you care? In practice, there's seldom a reason to use ClamXav unless a network administrator requires you to run an anti-virus application.
Thank you both for your very helpful and detailed replies. As you realise, I am new to Mac and was very conversant with Windows and protection methods.
Coincidentally, whilst waiting for your replies, I was expecting to receive an email from a friend with some information and clicked on the link given only to find it was not what I expected. When I rang my friend, I was told she had been hacked so I guess I have also. At the moment I cannot see anything wrong so my Mac may not be infected but as you say, I could pass on the hack to Window users.
I tried to do a system restore only to find I needed an external drive to form a first backup to enable a restore if need be. Then I thought I would download your suggested software in the hope that it would clear the offending hack but the download page strongly recommended backing up my system before I download. I do not yet have an external hard drive to back up with.
Have you any suggestions as to how I can find and clear the hack? Would the software you mention help? If so, would it be safe to download without a backup?
brbrown wrote:
Thank you both for your very helpful and detailed replies. As you realise, I am new to Mac and was very conversant with Windows and protection methods.
Coincidentally, whilst waiting for your replies, I was expecting to receive an email from a friend with some information and clicked on the link given only to find it was not what I expected. When I rang my friend, I was told she had been hacked so I guess I have also. At the moment I cannot see anything wrong so my Mac may not be infected but as you say, I could pass on the hack to Window users.
I tried to do a system restore only to find I needed an external drive to form a first backup to enable a restore if need be. Then I thought I would download your suggested software in the hope that it would clear the offending hack but the download page strongly recommended backing up my system before I download. I do not yet have an external hard drive to back up with.
Have you any suggestions as to how I can find and clear the hack? Would the software you mention help? If so, would it be safe to download without a backup?
The only AV I would ever use on a Mac if it were needed.
Safe to download and install, although I would highly recommend you think seriously about setting yourself up with a reliable backup setup.
Cheers
Pete
Hello Peter. Thanks for that. Yes I am going to get an external drive to do a backup. I will download clamxav now. Brian
Clicking a link like that does not mean that your Mac is instantly hacked.
First question, have you installed Java on your machine, and if so, is it enabled in your web browser? If you answered yes to both, you are at risk of drive-by downloads. It's still very unlikely that the link you visited would have resulted in installing Mac malware, which is still pretty rare, but it's possible. You may want to run a scan with anti-virus software.
Second question, have you installed Adobe Flash Player? If so, the same applies.
Java and Flash are the two most prominent ways to get your Mac infected. Java should not be used at all at this point, and Flash should be avoided or controlled with some kind of "click-to-play" functionality.
For more information on this, see my Mac Malware Guide. If you decide to get anti-virus software, use one of the programs it recommends.
Hi Thomas
I do have both Java and Flash installed but Java appears to already be disabled and I have disabled Flash. I am puzzled though because I thought both were needed to view some web pages. Is that not so?
There are some web sites that use Java. From reports, a lot of Norwegian Banking websites depend on Java. However, it is very rare to find a site that needs it.
Flash is predominately needed for web ads and some video streaming sites. As Thomas mentioned, use ClickToFlash or ClickToPlugin Safari extensions. The first just blocks Flash content from displaying automatically. If you want to see it, you click on it. The second blocks a lot of different plugins.
You can whitelist a website so that you don't have to click on its Flash content.
I use ClickToPlugin and you can set it to automatically substitute a website's HTML5 rendering instead of Flash, if it is available. I'm not sure about ClickToFlash.
Very few pages these days still require Java, and given the number of times new Java vulnerabilities have been found they will only dwindle further. See:
As for Flash, it's definitely more pervasive on the web than Java, but Adobe has been doing a pretty good job of keeping that up-to-date. They respond quickly to vulnerabilities (unlike Oracle, who has still not fixed the latest Java vulnerabilities), and there are fewer vulnerabilities found. Still, Flash is also something that is wise to be cautious of. If you want to use Flash, you should use something like ClickToFlash in Safari or "click-to-play" features in other browsers to prevent Flash content from loading without your explicit permission.
Edit: I notice Barney mentioned ClickToPlugin, which would work as well as ClickToFlash. It's important to note, though, that ClickToPlugin cannot protect against malicious Java applets. That is a common misconception, based on the fact that ClickToPlugin can block certain kinds of Java content, and I just wanted to be sure you are aware of this if you install it.
Ah! Thanks for that Barny and Thomas. I understand. I'll take a look at ClickToFlash.
Where can I find this "Click To Plug in Safari" or "ClickToFlash"?
If you have Safari 5.1.7 or above, you need clicktoplugin. Go to Preferences>Extensions>Get Extensions in Safari and find it there.
Barney, besides Norweigan Banks there are a lot of Brokerages here in the US that rely on it. Most real-time streaming quotes are delivered via Java. I know, I use them. It is unfortunate but true.😟
Free Antivrus for Mountain Lion.