I have no problem downloading files from my D4 with Nikon Transfer. I have version 1.5.2. I do have a Firewire 800 card reader that Transfer won't read, recognize or launch from. I can use it to download files using the Apple finder. The files work fine, but my renaming convention is broken. I do use a Lexar USB2 reader and it works fine, but slowly. I am not using CS6 however. I'm still using CS5.