I got no response in Bridge forum so I am trying here.
I am trying to help a friend with Mac Snow Leopard OS but i am a Windows person so maybe I did something wrong.
I downloaded and installed ACR 8.3. His 6D RAW files open fine in Photoshop CS6 but Bridge does not generate thumbnails. However I do see the small thumbs in the loader while importing the photos but once I am in Bridge there are no thumbnails. I deleted Bridge's preferences and deleted the cache but nothing helped.