MalwareBytes Anti-Malware for Mac Free
malwarebytes.com
You may feel it unlikely that your Mac will become infected with malware or adware, and not really see any point in taking up valuable resources running a scanner in the background all the time. And if you’re careful about social engineering tricks, you might well avoid catching anything. But if you share files with people, on a removable drive or over the internet, it’s good practice to be sure you’re not risking passing things on to other people. This on-demand scanner does the job, and it takes just seconds to do so.