Well it's swings and roundabouts, but here are several instances where MacOS has been vulnerable, one only 2 weeks ago in May!:
As has been stated elsewhere, like a bad driver of a car is sometimes referred to as "The nut behind the steering-wheel!", so it goes for Computer users in general - PICNIC - Problem In Chair, Not In Computer!
One of the worst security flaws in Windows was their XP Home editions. The administrator user was hidden and no password set for it - a user would have to boot Windows XP Home into Safe mode to set password for Administrator! What I like about Devuan is that you have a separate 'root' account from the user. I have to su in a terminal and enter the admin password before I can sudo apt-get install!
For Zorin users I would advise that you create two accounts - the first one with root permissions, the second one as a standard user, which you should use on a regular basis whilst using your machine for daily tasks.