Lightroom issue recognising card from Fuji X100

Hi.... just wondering if anyone can help on this.... I have been using my Ricoh GR and Fuji X100 on LIghtroom 3 on my MAC for several years without issue. Recently however, I cannot upload any images from the X100 as LR doesn't seem to recognise the memory card. The camera doesn't even come up as a source on the LR import screen anymore. I have changed cards and other settings but nothing seems to work. I did upgrade the MAC OS system to El Capitan recently so not sure if that has anything to do with it. Can anyone suggest anything? Thank you