TransGaming and 2K Games have released The Darkness II on the Mac App Store. It requires Mac OS X 10.6 or higher and cost US$29.99.
Here’s how the game is described: “The Darkness II continues the story of Jackie Estacado, head of a New York crime family and wielder of an ancient and brutal force of chaos and destruction known as the Darkness. Introducing unique Quad-Wielding combat and four-person cooperative gameplay distinct from the first-person campaign, The Darkness II breaks the mold of traditional first-person shooter titles.”