But the OS has been able to take advantage of it since mountain lion with grand central dispatch. I could be wrong with the code name. This makes doing parallel things very easy.

But most every OS can.

Parallelism is actually very difficult and libdispatch is not at all perfect for it. Swift concurrency is a newer design and gets better performance by being /less/ parallel.

(This is mostly because resolving priority inversions turns out to be very important on a phone, and almost noone designs for this properly because it's not important on servers.)