Some recommended fixes require payment
It’s taken a while to get the word out, but almost all Mac users now understand that their devices are not immune to virus attack. Antivirus protection is important. However, that doesn’t mean everyone wants to
pay for such protection. AVG AntiVirus for Mac is one of several totally free antivirus solutions designed to protect your Macs. This bare-bones software doesn't do much beyond taking care of basic antivirus tasks, but its protection against malicious and fraudulent URLs has improved since our last review.
Since Avast's acquisition of AVG a couple years ago, this product and Avast Security (for Mac) are now, if not siblings, at least cousins. On the PC side, the two free antivirus products are extremely similar under the hood, and company contacts assure me that the same is true of the Mac products. Note, though, that Avast offers Mac users a bit more than AVG does. In addition to basic antivirus protection, it includes a network security scanner.