How to eject a CD on a MAC mini with PC keyboard and mouse
There are several options to eject a CD or DVD when the mac mini fails to boot, but most of them dont work if you do not have a mac keayboard at hand. The following options work with a PC keayboard and mouse:
Press the left mouse key while you restart the mac or as alternative press [F12] while the mac is restarted. You have to keep the key pressed until the CD is ejected.