Microsoft Security Essentials by Microsoft is a well-known application that can help you protect your computer against viruses, spyware and other malware. Sadly, a version of Microsoft Security Essentials for Mac has not been developed, but you can download and install other tools that can help you keep your system safe. This list provides you with several alternatives to Microsoft Security Essentials for Mac.
Feel free to add any alternative to Microsoft Security Essentials for Mac that you know of.
Suggest Alternatives
Personally, I prefer Norton AV. Even though it requires buying a licence, its performance perfectly suits me. The only downside I would like to mention is that it consumes quite a lot of system resources, so you need a fast machine or the utility will be rather slow.