Optical drives typically include a small pinhole large enough to insert a paper clip end to manually eject a stubborn disc. Since the Mac Mini doesn't include this feature, you must use other methods ...
There’s a ton of reasons why a disc may get stuck in your Mac. Not only is it frustrating, but it can also bring you into a cold sweat — panicking about how to remove it when there’s no easy access.
Every once and awhile, your Mac will decide not to eject a CD or DVD, for various reasons. It could be that it can’t detect the disk, it’s in an incompatible format, or that the disk itself is locking ...