The old canard that Macs don’t need antivirus software has by now been (we hope) thoroughly debunked, but if not: AV-Test measured more than 12 million attacks on Macs and 38,000 new Mac malware samples in 2017, peaking in December.
AV-Test is a Madgeburg, Germany-based lab that periodically evaluates antivirus software for Windows, macOS and Android.