Sorry Jim, I should have included that info. I'm not at home so the exact name of the operating system eludes me, but I believe it's the latest version on Mac (it is five months old). The version of LR is 5.5. I'm using a canon rebel t3i. The files do get exported and the extension is CR2. I also tried DNG which of course has a DNG extension. I typically download via USB, but I tried using the card just in case, but it didn't help. And lastly, I am able to see the raw files in LR.
Hope this helps!