superdrive not reading disc, can't eject
Have just purchased a superdrive to use with our iMac. Put a disc with photos on it in (probably made on a Windows computer) and it makes all the right noises but doesn't seem to be recognising anything. Now I have a disc in the drive and no way to eject it as the drive is not showing up in a finder window at all. Any help much appreciated.
iMac, macOS Sierra (10.12.2)