iMac no longer recognises my USB from camera since updating to OX EL Capitan
i have a Sony DSC- RX100 digital camera. I have been uploading photos via USB onto my Apple I Mac without a problem. however since I updated my iMac with OX El Captain this morning the camera USB is no longer recognised so i am unable to upload my photos to computer.
Any advice would be grateful received.
iMac, OS X El Capitan (10.11)