Kaspersky Anti-Virus for Mac has been developed to meet the specific security requirements of Mac users who know the value of the data stored on their computers, as well as the need to keep them running smoothly.
Highlights:
· Real-time scanning of files, Internet downloads and mail attachments
· Includes latest Kaspersky antivirus technologies for better protection
· Fast and non-intrusive with only 1% CPU impact on your Mac performance
· Familiar Mac-style appearance and operation
· Special safeguards to prevent Kaspersky Anti-Virus from being compromised
· Automatic regular and emergency updates for always-on protection
· Prevents you passing non-Mac threats on to friends and colleagues using different types of computers

You can download it at kaspersky website