Mac users interested in Single player space rpg generally download:
Engage in ship-to-ship battles of the opposing factions from the Iron Sky movie franchise. Develop your defensive and offensive capabilities by putting money and experience points into new skills, weapons, and equipment. Unlock new content by progressing the game.
Additional suggestions for Single player space rpg by our robot:
Fight, explore the stars, trade, and lead your fleet across the galaxy.
Space Commander ...Trade is a single player space sim featuring...to sandbox RPG
FREE update for owners of Version 2.0 or higher.
Hero Games RPG (like Champions...names to Space Ship...sheets with a single click