why in the first do you use Mac?...
did you ask yourself this question ???
WHY would anybody even think of downloading crap on your beautiful Mac, and then complain that this crap messes up their system????
DO YOU UNDERSTAND, that MAC is NOT designed for CRAP, but for brilliant Mac Software...???....not for google, not for mozilla, not for windoz.
Anything not related to Mac, will mess up your Mac, or will turn your Mac into heavy luggage loaded with crap.
Think a little....