I had the iMac G4 about 10-15 years ago and I had a slew of good games for it. Nowhere near the amount available on other platforms but I was kept busy. These days when I look on Steam for instance yeah there's perhaps a larger proportion but still most games are Windows only ... The Mac never was nor will it ever be a serious gaming platform.
Not disagreeing ... it makes little sense to develop commercially for Linux and never has. That doesn't mean that Mac isn't still a niche platform though, and banging on about number of tickets raised isn't really an appropriate way to quantify the value of a particular segment, or not.