Here are the top 10 antivirus software for Mac OS X. A number of the best software on the Mac are completely free.

1. ClamXav

ClamXav is a free virus checker for Mac OS X. It uses the tried, tested and very popular ClamAV open source antivirus engine as a back end. ClamXav is an able antivirus program that will keep your Mac protected, though it doesn’t offer all the features that more-expensive programs do.If you’re looking for free Mac antivirus software, ClamXav is certainly a virus scanner worth trying.

2. Norton AntiVirus For MAC

Norton AntiVirus(NAV) For MAC provides virus protection, virus scan and removal for Macs, blocks Internet worm attacks.NAV is the 800-pound gorilla of antivirus software, and NAV proves that reputation is well deserved.It automatically removes viruses from email attachments, Internet downloads, and other sources.

3. iAntiVirus Free Edition for Mac

With iAntiVirus you are protected against the most nefarious cyber-threats attempting to gain access to your Mac and personal information. Once your computer has been infected, a virus or worm will usually attempt to spread itself to your friends, family and associates by accessing your email contacts and networked PCs. The infection may also allow hackers to access files on your Mac, use it to launch attacks against other computers and websites or to send mass SPAM email.

iAntiVirus provides real-time protection and comprehensive system scanning to ensure your Mac remains safe and virus free. iAntivirus guards against Mac only malware, including viruses, worms, trojans, spyware and adware.

4. Avast Antivirus Mac Edition

Avast! Mac Edition is based on the multi-award winning avast! technology, to provide protection for your Macintosh against the latest malware threats. avast! antivirus has been voted the best anti-virus product, both in Europe and in the United States, and won the European best anti-malware category outright in the coveted SC Awards.

Avast Antivirus Mac Edition has the same ICSA Certified scan engine as all Avast antivirus products, offering protection against the latest and legacy virus, malware, Trojan horse, and spyware risks. Virus definitions and scanning capabilities are updated often, so you can rest assured that your Mac is protected at all times.
5. McAfee VirusScan for Mac

McAfee VirusScan for Mac, formerly known as Virex, guards against all types of viruses and malicious code, including new and unknown threats, that target OS X.

 VirusScan for Mac offers unintrusive, effective protection that hunts down and kills viruses, worms, Trojans, and other malicious code as they attempt to infect systems, allowing users to continue to work uninterrupted. Easy to use and always on guard, VirusScan for Mac automatically checks for the latest virus updates, so your protection is always up to date. It is supported by McAfee Avert Labs, one of the world’s top threat research centers.

It can be managed by McAfee ePolicy Orchestrator for scalable security policy compliance and graphical reporting. It includes true On Access scanning and supports scanning of Apple Mail messages on Mac OS X Tiger.

6. Intego VirusBarrier

VirusBarrier is the simple, fast and non-intrusive antivirus solution for Macintosh computers.

VirusBarrier provides realtime signature-based and behavior-based scanning and guards against both Mac-specific and Windows-based malware.It offers thorough protection against viruses and malware of all types, coming from infected files or applications, whether on CD-ROMs, DVDs or other removable media, or in files downloaded over the Internet or other types of networks.

VirusBarrier protects your Mac from viruses by constantly examining all the files that your computer reads and writes, as well as watching for suspicious activity that may be the sign of viruses acting on applications or other files. With VirusBarrier X5 on your computer, you can rest assured that your Macintosh has the best protection available against viruses of all kinds.

VirusBarrier X also sports a new interface, fully respecting Appls aqua guidelines, and making the user experience simpler and more exciting.

7. ProtectMac AntiVirus

ProtectMac AntiVirus has been designed by security experts to keep you protected from today’s computer threats. It utilizes the best in Mac technology to deliver a security solution that is both easy to install and easy to use. The user-friendly, graphical interface enables you to perform user scans, set up scheduled scans to run in the background and manage any threats that are discovered.

ProtectMac AntiVirus allows you to scan any area of your Mac or network for both Macintosh and non-Macintosh malware. It automatically checks for updates daily, downloading new threat identities and product updates and installing them without user intervention or the need to restart your Mac.

8. Sophos Anti-Virus for Mac OS X

Sophos Anti-Virus for Mac OS X provides cross-platform detection of viruses, spyware, Trojans, and worms, and now includes support for 10.5 (Leopard).

Sophos Anti-Virus for Mac OS X provides integrated cross-platform virus detection on Macintosh servers, desktops and laptops. Our powerful Sophos virus detection engine scans all entry points, and also detects non-Mac viruses that could be harbored on Mac computers. InterCheck technology keeps users safe by intercepting all files accessed and scanning them in real time. The Sophos Anti-Virus GUI allows users to scan files, folders and volumes on demand. Users can also use the new command-line interface to initiate scans.

9.ChkRootKit_MacOSX

ChkRootKit_MacOSX is a free tool that can detect some kind of malicious applications. It is an utility to detect WORMS, LKM TROJANS and other small dirty animals which could invade your computer.

ChkRootKit_MacOSX is a GUI integration of the CLI “chkrootkit” of Pangeia Informatica.
10. Zebra scanner

Zebra scanner is intended to search for applications, hidden behind another extension than APP .
It checks if any of the files in the selected folder have either the real extension APP or the file type APPL , and if the OS considers the file to be an executable that can be launched by double-click or otherwise activated. It detects applications disguised as other file types such as an image, MP3, movie or folder. Thus avoiding that a hidden application can be double clicked by accident and do damage to your Computer. Zebra scanner can also examine classic data.

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