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software used to prevent, detect and remove malware such as computer viruses, computer worms, trojan horses, spyware and adware.

10 votes

Why does OS X warn me before running an app downloaded from the Internet?

There is a credible threat. You have to understand that virus means different things to different people, but the entire reason of it is to let a user know that there's a possible attack vector there. …
Nicholas Smith's user avatar