Virus protection for my IMAC?

Hi ImageOpus,

Welcome to Apple Support Communities.

The best is none!

macOS has built-in security. See:

• macOS - Security - Apple
• Protecting against malware in macOS - Apple Support

-Jack

Keep the OS up to date, and avoid downloading software from sources other than the Mac App Store or the developer websites.

If you're referring to biological viruses, wipe the keyboard and mouse.

(200476)

The best antivirus, cleaning app, and overall maintenance app for Mac OS is Mac OS itself. All you need to do with Mac OS to keep it secure and running well is to keep it up-to-date and do periodic (about 1x per week) restarts. Other than that, leave it alone. Adding third party antivirus, cleaning, security and other types of maintenance apps to Mac OS adds no additional level of security. The only thing these apps do is have the opposite affect users want. They make Mac OS slow, unstable, generate odd behavior and make Mac OS appear buggy. 

ImageOpus Said:

"what is the best virus protection I should use on my IMAC"

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Blow it Off:

There are no viruses for Mac. You're fine without it.