Mac-based computers have been host to all the normal types of malware for more than two decades. The first PC virus, Elk Cloner, was written for a Mac, then DOS became more popular, so the virus writers started writing for DOS. Windows has been the primary target of hackers ever since; Linux has its fair share of malware. The IM invasion (as I called it) was replaced with a p-to-p push, then music downloads (full of malware), and unauthorized USB keys.”]
Source: https://www.csoonline.com/article/2633135/protecting-the-end-user.html