[Swordmaker]

Most PC viruses require the user to click on something to install it.

To install malware on a Mac requires providing an Administrator name and password, not just "clicking on something" to install it...

[Anitius Severinus Boethius]

Yep, it sure does. And those users will do it. They will see something that will “optimize” their system, they will click on it, it will ask for their Administrator credentials and they will give it.