I've been a Mac fan since the sixties. Couldn't afford it until the eighties. I used to read the US stereo mags, particularly Stereo and HiFi back then, and I remember that around 1970 or so, Mac stopped being mentioned in the magazines. The story was that one of the mac guys (maybe Gordon Gow?) became incensed at an article published in a magazine by one of the big reviewers (I can't remember who, but he was one of the major names at the time) and pulled Mac completely out of the hifi mags. No advertising, and no reviews. This lasted many years and effectively moved Mac out of the headlights of the highend community, and fostered the attitude about Mac that has persisted.
In the nineties that story was repeated to me by a salesman at a store that carried Mac, supporting my memory of events.
Bill