Sophos unveiled free antivirus software that Macintosh users can install to detect and block malware that targets computers running the Mac operating system.
Sophos Anti-Virus Home Edition for Mac also detects malware written for Windows that Mac users can spread via USB drives and email, according to Chet Wisniewski, a senior security adviser at Sophos.
The software is a non-commercial version of Sophos Anti-Virus 7.2 for Mac, targeted at home users and modified so it is easier to install and use, he said.
The free Mac antivirus software from Sophos, which also launched a Mac support forum, will compete with ClamXav, Avast and PC Tools' iAntiVirus. Sophos has more information about Mac threats in this blog post.
While the vast majority of malware is written for the Windows platform, Mac threats do crop up. Last week, the Boonana trojan horse surfaced. And in an update to Snow Leopard in June, Apple added software to protect Macs from a trojan horse that was being distributed by attackers disguised as iPhoto.