I saw recently that John Romero tweeted that the best modern way to play Doom is to download the Doomsday Engine. I did this for my Mac, but it doesn't come with the WAD Files, which are required to play the game. I did an online search and it seems that these aren't freely available, but I can't find a MAC Version of the game for purchase.
If I buy the Windows or Linux versions of Doom, will the WADs therein be compatible with the Doomsday Engine for Macintosh? If so, how can I extract just the WAD files from the installer, if any?