Are you sure it's a blank CD? Which mac model do you have & which OS version are you using? Is your cd burner internal/external &//is it one that came with your mac (eg-SuperDrive)? What type of cd is it you put into your drive cd-r/cd-rw?

If you're using OSX, open your System Prefs & open the CD's & DVD's section. Tell me what you have listed/selected there.
There is a chance that particular disk is brummy, have you tried another? To expand on that, sometimes you can purchase blank media that has manuafacturing defects. It's happened to me many times over the years. In fact one time most of an entire box of ten. I got my money back.