Selectsoft’s Mahjongg Staxx is available in the Mac App Store in the Game category. It costs US$4.99 and requires Mac OS X 10.6.6 or higher.
Here’s how the game is described: “Mahjongg Staxx features multiple game modes, next-generation 3D play, exclusive game editors and more. Play with the largest collection of tile sets and layouts ever, or import photos to create custom tile sets and layouts for a unique personalized experience.
“Mahjongg Staxx offers classic mahjongg solitaire gameplay with a twist — up to 24 layers of tiles per layout. Players need a sharp eye as they search for matches in stacks of tiles and try to clear the board. With multiple game modes, everyone can find their favorite way to play.”