AV on Mac

Of course you will need that, as even Apple is sayingnow. I can say that the need for anti-malware is one of the "growing pains" for end user Operating Systems. Soon they will start to suffer from backward compatibility issues, "too dumb" users, bad written applications and other problems that WIndows had to deal with during the last years. At least there are still the hardware vendor "monopoly" for Mac OS, what makes things a little easier for the OS. The other things will likely be exactly the same.