MC 8.5 Segmentation Fault 0x0

Help!!! 

I had 4 edit stations successfully running , media composer 6.0.5.1 on imac OS 10.8.5.

For Other software reasons, I had to upgrade OS to 10.10.5

I have 3 that have all of a sudden stopped and refused to load AVID and are returning the following message:

Alert

"Segmentation fault" in thread "MainThread", at address 0x0

I have come to learn that this is becuase my 6.0.5.1 MC is not compatable with new OS.  

SO, I upgraded MC to 8.5

Now, I am in the exact same situation.  MC crashes on load and gives same error message.  

I am dead in the water and need to solve.

Please Help.