There is another thread on this topic with plenty of information, but does not seem to have any response even though many people are consistently having this issue even after the most recent patch.
I have had it intermittently since I purchased the game 2 months ago. At first it seemed to be solved by turning of Steam Sync, then it came back. Then it seemed to be solved by deleting as many additional saves as possible. Then it seemed to be solved by the first autosave "clearing" somehow - IE if I tried to quick or manual save, it would crash, but after an autosave triggered, it would go away. Now it is back again for auto, quick, and manual saves.
PLEASE AT LEAST RESPOND TO THIS ISSUE. Many people have it and the game, while excellent, is not cheap. I and everyone else expects more for this price.
I am on a MacBook Pro late 2013 Retina, 10.10.2, 2.4 Intel i5, 8 GB RAM 1600 MHz DDR3, Iris Intel 1536 MB