Why wont my MacBook work with an external cd drive

Can you hold your computer up a little higher, please, I can not quite read the model year from here.

And what is this external CD drive you speak of?

and how are you attempting to attach it?

and what version of MacOS is involved?

and what error messages or problem indications are you receiving?

A little higher still, please. I still can't see your information, even with my glasses on.

Perhaps you did not understand.

Please post the information I asked for. NO ONE can help you without that information.