Hallo! I have lightroom 3 and a mac computer. When I connect my canon 6d to my computer to transfer my pictures into lightroom i get a message "following pictures could not be read..." Why is that? It usually works, and even now I can see the pictures in the camera and even as a teaser in lightroom but I cannot tranfer them into the program. Why is that?
You need to upgrade to Lightroom 4.3 (or later, the current version is Lightroom 5.6) in order to import these RAW photos into Lightroom.
Alternatively, you could use the free Adobe DNG Converter version 8.6 and convert the RAWs to DNG, which can be imported into Lightroom.