A great retrospective on Mac gaming by Jeremy Parish:

Mac games were actually pretty weird and unique in the olden days, and I actually could see someone being a Macintosh-exclusive gamer in the ’80s. The platform offered (1) mouse-based controls and (2) no color, or at least no guarantee of color support until they stopped selling the Mac SE and pre-PPC PowerBook lines in the mid-’90s. Perhaps unsurprisingly, Mac games felt a little different from console and DOS counterparts. Another factor there came from the fact that Macintosh had system-level support for graphics, it using a visual interface and all, whereas other computers kind of needed to be tricked in various degrees before they’d display images.

I’d argue that the Mac App Store has helped in facilitating distribution of modern Mac games, although, from a gamer’s perspective, it’s still inferior to other services – especially for clarifying hardware requirements.