I just got a brand new mac pro. I opened the cd drive with the eject button on the keyboard, and then went to close it the same way, the cd drive goes in, but the metal gate doesn't come back up. What can i do?
It's likely the case will have to be replaced. I've fixed this before by lightly tapping on the area below the gate, but it's a recurring thing.
You can also slide the optical drive housing out and take a look at the mechanism that raises and lowers the gate. Try manually pulling it up and down a few times.