Mac OS X Viruses and Antiviruses

This page only covers malware for Mac OS X. For information on viruses for the Classic Mac OS, see Classic Mac OS Viruses.

Mac OS X Viruses

Free Mac OS X Antivirus Software

The following free antivirus apps are listed in order of the Mac hardware and operating systems they support, going from the oldest to the newest.

clamXav may be the oldest OS X antivirus software in existence. It's based on the open source ClamAV application. Version 2 requires OS X 10.5 Leopard or newer. Version 2.2.1 is available for those using OS X 10.4 Tiger. The Mac App Store version of clamXav requires OS X 10.6 Snow Leopard or newer.

Sophos Anti-Virus for Mac Home Edition is compatible with Mac OS X 10.4 Tiger through 10.8 Mountain Lion. It supports both PowerPC and Intel Macs.

avast! Free Antivirus for Mac is compatible with Mac OS X 10.5 Leopard through 10.8 Mountain Lion. It supports Intel Macs only.

iAntivirus is compatible with Mac OS X 10.6 Snow Leopard through 10.7 Lion. It supports Intel Macs only.

Commercial Mac OS X Antivirus Software

Intego VirusBarrier X6 is compatible with Mac OS X 10.5 Leopard and newer.

Intego Internet Security Barrier X6 is compatible with Mac OS X 10.5 Leopard and newer.

Kaspersky Security for Mac is compatible with Mac OS X 10.6 Snow Leopard through 10.8 Mountain Lion. It supports Intel Macs only.

Norton AntiVirus 12 for Mac requires OS X 10.7 Lion or newer on Intel Macs. Version 11 supports OS X 10.4 through 10.6 on PowerPC and Intel Macs.

Norton Internet Security for Mac, version5 requires OS X 10.7 Lion or newer on Intel Macs. Version 4 supports OS X 10.4 through 10.6 on PowerPC and Intel Macs.

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