At this point in the championship, I think the image that the Mac is a totally malware-free computer has been totally deconstructed of course, overall it's more secure than Windows (no known viruses, for example), but that doesn't make it indestructible . And you see, this is good: users are not totally relaxed and they are taking measures to prevent infections in their machines, which in turn discourages the community of crackers.
Also, it is always good that any threats to macOS that are documented come to the public as soon as possible. Not the case with our subject today: malware OS X / SearchPageInjector It was discovered by Intego people in January, but only released this week because another security researcher published similar but less conclusive findings.
How to protect yourself from the attack, then? According to Intego, its VirusBarrier protection software has been able to detect and terminate OS X / SearchPageInjector since January 2018 now that the problem has been publicly reported, however, Apple is expected to act on it in a future software update. . The company also recommends that you do not download files (especially fake apps) via torrent.