June 21 2015 and shadow and graphics problems

As i sail my ship from one port to another a big reflection of my ship is on the water that covers the entire screen. Also other ships reflections do not follow the assigned ships. Occasionally a big dividing line appears on my screen that won’t go away until i restart the game. When speaking to the Govenor of a port town the screen locks up or has a static effect. I Use one of the Latest IMac computers that should have no problem supporting a older game like this. I wouldn’t waste my money purchasing this game until the problems are fixed.

FATFINGERED about Sid Meier's Pirates!