Avira Pro and Free use the same detection engine. AV-Comparatives gave Avira Pro for Mac a 99.8 percent protection rate from 585 malware samples. What you do get is a solid anti-virus solution.
It doesn’t include USB scanning, which is a special feature for the paid version. For no money down, this suite offers real-time protection and a firewall.
If you’re the type of Mac user who hates the idea of running an anti-virus suite but recognizes its necessity then Avira Free Antivirus for Mac might be for you.