This question seems to pop up every couple years. I guess Mac has been around so long that all kinds of opinions, myths, etc. have been perpetuated through the years. In this hobby a salesman or friend can say something to someone just starting out in the hobby and it be taken as an absolute and passed on.
Like many companies, Mac has had their good and not so good. As someone alluded above, Mac grew a great reputation in the yearly years of audio. But they had some lean years in the 80's and early 90's, this being my opinion. Since the late 90's I believe they have been producing some great products.
Like any hobby, you will have those that do not agree.
Anyone can look at my system and see I have Mac, but those claims made above that state I own it for status or to impress don't work for me.
Also, I have owned many other brands through the years, Levinson, BAT, Rowland, Pass, MF, I didn't just buy it because of some lore of old. But I do admit Newbee, I like the looks, including the blue meters. :)