Hi Diki
Virus writers target the most popular OS, so you’re reasonably safe at the moment.

Spyware gets in through the browser and can get information about what you do when you use your browser, and affect all OS. (Mac included)

Malware is similar to Spyware and again uses the browser, so is OS independent.

BTW unless you have protection installed you would not know what is going on with your computer, as all the nasty are designed to do their stuff without your knowledge.

Hope this helps

Bill