I'll go for the somewhat obsolete `drutil eject` as Mac OS can be sometimes rather reluctant to eject cycle optical drives if it doesn't actually think a disc i

I'll go for the somewhat obsolete `drutil eject` as Mac OS can be sometimes rather reluctant to eject cycle optical drives if it doesn't actually think a disc in in them. Although nowadays you'll probably be using a 3rd party tray load drive with an eject button instead of a no-button slot loading Apple one.