If you got a Mac with viruses, don't take it to an Apple store. With Apple stores, at least the ones I've been to, they will claim that the Mac doesn't get viruses. If you go to a computer shop where they work on computers other than an Apple store they will tell you that contrary to what some people say, Macs do get viruses, at least that's what I was told when I visited such a shop. I sometimes go to a computer shop where they mostly work on PCs but they also work on Macs and the guy there said that Macs do get viruses and he fixes them. Macs might not get viruses as easily as PCs but nevertheless they do. So, if you got a Mac with viruses, its probably best to bring it to a computer shop that works on Macs but not an Apple store where they will go by their claim that Macs don't get viruses.