Posted April 20, 2015
Oh, MAS Mac App Store. I'm so used to seeing the reliably uninteresting Mac GAME Store here that I made a stoopid. As I have Prey from the MAS, let me say that there is NO KEY for you to take to Steam. The game ties to your AppleID, and the developer cannot know who you are to even try to distribute a key.
pen_sq: Prey almost certainly uses an Aspyr Mac-only installer, as the game never went SteamPlay. Funny how they could never figure out how to sell the PC version again once they ran out of the original issue of keys, but Prey still lives on just fine with the Mac.
Foxhack: The game never went Steamplay but all retail box keys - for all OSes - activate on Steam. The devs added that feature soon after launch.