The MacBook Superdrive Won't Burn

Verify that the CD is a CD_R, DVD-R, or CD-RW disc. This information will be printed on the disc. If iTunes indicates the disc is already written to, try another blank disc.
Check the underside of the disc for dust and dirt.
Gently wipe off the bottom of the disc with a soft cloth and try the disc again. If you notice excessive scratches on the disc, try a new blank disc.
Press the 'Eject' key on the top-right of the keyboard and hold it down to verify a disc is not already in the drive.
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