Mac is an operating system developed and designed by Apple Computers for their Mac line of laptops and computers. For years there has been a debate whether Mac requires the protection of an antivirus, and since decades Apple users and software experts claim that Mac is the most secure operating system in the world and it doesn't need any antivirus for its protection and smooth running. However, the recent popularity of the Apple products all around the world ensures that like Windows, even Apple's Mac is prone to a number of vulnerabilities and its a good idea to secure it.
Mac users need to know which is the best antivirus software for Mac just because a Mac can be attacked by viruses like every other operating system in the world. The reason the attacks are not in large number is because Apple continuously releases additional security updates to keep Mac users safe from viruses. It's a fact that Windows still holds 90% of the market share which is why it's the most infected operating system in the world, but with Apple's growing popularity all around the world, I'm pretty sure that even Apple will become a soft target very soon.