keyboard eject button does not eject tray
Hello I have a LG external USB reader/writer. I have been unable to find an answer on an issue with the eject button on the wireless keyboard that ships with iMac 27" 2013 model. As the subject line says when I depress the eject button it does not eject the tray. I have tried it with a cd/dvd in the drive as well as without and it does not eject. Does anyone know why this might be? I assume it *could* be because the iMac had Yosemite installed and I upgraded to El Capitan. To complicate the issue I did not have the external drive during the period that the iMac was running Yosemite.
Thank you,
Mel
iMac (27-inch, Late 2013), OS X El Capitan (10.11.1)