It is not a question of superiority, but usability.
MAC were designed originally for professionals in the printing industry. They were very good with graphics, but it stopped there.
IBM came in, then Microsoft, and we had the PCs, then Windows.
PC's were much less than half the price of a MAC. Hence, a majority of people went for it, especially people who were NOT professionals!
The PC market grew so much, that pro's of MAC became insignificant!
BUT, professionals STILL needed Computers, and many software developers designed and promoted complex programs for PCs.
That was the end of MAC's.
When the web came in, of course, Apple developed its AppleWebKit: a fantastic (at the time) web engine.
So did MS. But, again, there are 500+ PC users for 1 MAC: market drives development.
Nowadays?
Many professional programs do not work well on MACs
Many web developers don't even bother to write their code for the AppleWebKit engine: Apple never caught up with the w3c directives, and many new websites don't even show up on MAC's: the Engine is crap!
Still, between a PC at 500$ or a MAC at 1000$, the choice is easy.
And, as a professional, a program like AutoCAD runs much better on a PC than on a MAC. As simple as that!
Now, "Superiority" ???
Don't make me laugh... On electronic's point of view, MAC's are FAR behind the speed of any (new) PC...
You want a MAC? Sorry! You are OUT OF THE LOOP!