2507 Views 6 Replies Latest reply: Jan 5, 2009 4:51 PM by Sebastian Palka
Why do you need AV for OS X? Macs are still not very prone to viruses.
If you must have one, I would recommend ClamXav. It's not particularly fast, but no AV software is worth paying for on OS X. I will warn you to stay away from Norton AV, since there software seems to slow computers down.
ClamXav is an open source AV scanner for OS X based on the popular UNIX ClamAV virus engine.
I was searching the net and something popped out out of the blue. I'm not good with the computer business, freaked out. forced quit everything and restarted the whole thing. you might be right. all looks like before and there is no problems. maybe i don't need it.
thanks a lot for so quick replay.
No viruses that can attack OS X have so far been detected 'in the wild', i.e. in anything other than laboratory conditions.
It is possible, however, to pass on a Windows virus to another Windows user, for example through an email attachment. To prevent this all you need is the free anti-virus utility ClamXav, which you can download from:
However, the appearance of Trojans and other malware that can possibly infect a Mac seems to be growing, but is a completely different issue to viruses.
If you allow a Trojan to be installed, the user's DNS records can be modified, redirecting incoming internet traffic through the attacker's servers, where it can be hijacked and injected with malicious websites and pornographic advertisements. The trojan also installs a watchdog process that ensures the victim's (that's you!) DNS records stay modified on a minute-by-minute basis.
SecureMac has introduced a free Trojan Detection Tool for Mac OS X. It's available here:
The DNSChanger Removal Tool detects and removes spyware targeting Mac OS X and allows users to check to see if the trojan has been installed on their computer; if it has, the software helps to identify and remove the offending file. After a system reboot, the users' DNS records will be repaired.
(Note that a 30 day trial version of MacScan can be downloaded free of charge from:
and this can perform a complete scan of your entire hard disk. After 30 days the cost is $29.99. The full version permits you to scan selected files and folders only, as well as the entire hard disk.)
A white paper has recently been published on the subject of Trojans by SubRosaSoft, available here:
Also, beware of MacSweeper:
MacSweeper is malware that misleads users by exaggerating reports about spyware, adware or viruses on their computer. It is the first known "rogue" application for the Mac OS X operating system. The software was discovered by F-Secure, a Finland based computer security software company on January 17, 2008
On June 23, 2008 this news reached Mac users:
More information on Mac security can be found here:
The MacScan application can be downloaded from here:
You can download a 30 day trail copy which enables you to do a full scan of your hard disk. After that it costs $29.95.
More on Trojans on the Mac here:
The latest news on the subject, from July 25, 2008, is:
Attack code that exploits flaws in the net's addressing system are starting to circulate online, say security experts.
The code could be a boon to phishing gangs who redirect web users to fake bank sites and steal login details.
In light of the news net firms are being urged to apply a fix for the loop-hole before attacks by hi-tech criminals become widespread.
Net security groups say there is anecdotal evidence that small scale attacks are already happening.
Further details here: http://news.bbc.co.uk/2/hi/technology/7525206.stm
A further recent development is the Koobface malware that can be picked up from Facebook (already a notorious site for malware), as reported here on December 9, 2008:
There may be other ways of guarding against Trojans, viruses and general malware affecting the Mac, and alternatives will probably appear in the future. In the meantime the advice is: be careful where you go on the web and what you download!