How can l eject a disk from a mac mini. It does not seem to want to come out

Not sure if there is something specific to be done with the Mac Mini, but usually you can click and drag the disc to the trash, which will turn into an eject icon. Or on the keyboard in the upper right there is an eject button.

There are two ways...
1. you can either press a button on your keyboard in the right hand corner with the eject button
2. drag the disk icon down to the tool bar and land it on the trash and it will eject it!

If these fail reboot while holding down the eject keyboard key