Go for CK2
Very good game, but Crusader Kings 2 provides a much more extensive gameplay value of this time period with pretty much the same operating system requirements.
Europa Universalis III: Chronicles includes the award-winning epic strategy game where players take control of a nation and guide it through the ages to become a dominant global empire.
Unparalleled in its depth and historical accuracy, Europa Universalis gives players the freedom to rule any nation from an impressive choice of over 250 countries.
Europa Universalis III: Chronicles includes:
Notice: This Game Requires a Macintosh Computer