When I try to load Big Fish Games, my mac says it doesn't recognize the developer. What can I do?

You can set a general trust level, which is either:

• Allow apps to run that are downloaded from the Mac App Store;
• Allow apps to run that are downloaded from the Mac App Store, or from identified developers.

System Preferences﹥Security & Privacy﹥General﹥

Regardless of this settings, you can override this on a case-by-case basis, by right-clicking or Control-clicking the app or installer and choosing Open in the contextual menu, then in the next Are-you-sure dialog box, select Open again.