What's the best way to check for virus or malware?
My son has a MacBook Air running High Sierra. The other day he asked me how to check for a possible virus. I've always heard on the forum not to use any virus scanning software like Clean My Mac, etc. Not sure what the current recommendations are. Is there a good resource for what to check for? I assure things like login items and browser extensions. He said that he was on his University website and clicked on a resource link on the site and it took him to a weird "scammy" site. Clicking on the link again, took him to the correct location. Just weirdish stuff. Any suggestions? Thanks.
MacBook Air