Here are a few of the offerings on Mac on sale:
http://www.gog.com/en/promo/mac_games_launch_promo_18_10_12
For all 50 GoG games on Mac hit this link then filter by system:
http://www.gog.com/en/catalogue
The place for conversation that doesn't make sense to talk about in any specific game in our list. Think of General Discussion as a "catch all" for conversations about gaming, game culture or anything else worth sharing.