My iMac's DVD player won't play. Discs are not recognised and rejected?
I have tried to play a variety of DVDs on my iMac but after thinking about it for 30 seconds or so the discs are rejected and ejected. However, it's not all discs. I have found one or two that it will accept and play. Confused...
iMac, OS X El Capitan (10.11.1)