With no disc in the DVD drive - no icon representing the (missing) disc in the DVD drive will be present on the Desktop. Note: it is the disc's icon that appears - on the 'Desktop' and within 'Disk Utility', etc., not an icon of the DVD drive. [14.02.2006]
With no disc in the DVD drive - no icon representing the (missing) disc in the DVD drive will be present, in the left side volume list, in 'Disk Utility'. Note: it is the disc's icon that appears - on the 'Desktop' and within 'Disk Utility', etc., not an icon of the DVD drive. [14.02.2006]
With a disc in the DVD drive - an icon (of the disc, not the DVD drive) will appear on the Desktop ... if - 'Finder's preferences is set to display such.
Select 'Finder's 'Finder, Preferences ...' menu item, and then click on the 'General' tab. The 'CDs, DVDs, and iPods' check box must have a check mark present for inserted discs (into the DVD drive) to appear on the Desktop.
With a disc in the DVD drive - an icon representing the disc will be present, in the left side volume list, in 'Disk Utility'.
Whether or not the 'Finder's 'Finder, Preferences ...' menu item's 'CDs, DVDs, and iPods' check box has a check mark, when a disc (at least a data disc) is inserted - a window displaying the contents of the disc is displayed.
Typically, when posting to a forum - one specifics their model Mac and MacOS X / System version number.
Ejecting a disc:
Assuming an iMac / PowerMac is being used, with a standard keyboard, to eject a disc, not in use by any application(s), press the [upper right most] 'eject' key.
With a disc in the DVD drive - and its icon representing the disc present in the left side volume list, in 'Disk Utility', click on the disc's icon, to select it, and then click on 'Disk Utility's 'Eject' button.