I just upgraded to Mavericks and Lightroom 5 on a 2008 Macbook Pro.
LR5 is working fine on my photos that have already been imported. However, when I plug in my camera to import new files (RAW and JPEG), the camera does not even mount - aka. does not show up as a possible source at all. I have tried turning off and on, restarting, and using the old LR4 to see if that would solve the problem, but it did not. I also tried importing from the EOS Utility, but that does not recognize the camera as a possible source either. Please HELP!