Incorrect - the new Mac Pro got plenty of advertising in United States movie theaters. Pretty awesome on the big screen. I don't know about television ads here or elsewhere as I generally don't watch commercials.Apple hasn't explicitly advertised Mac since 2009. That is approximately 7 years ago. That last 3.5 years have been the 2nd half of that era.
The entire effort seems to be Apple Store and hipster paid product placement. That is it.