If you want to reuse a CD-RW disc, you must first erase the existing information on it. Before you erase the disk, make a copy of any files you don’t want to erase. Erasing, reformatting, or preparing a disk for burning permanently deletes all of the disk’s contents. 


  1. Insert the disc.
  2. Open Disk Utility (Applications/Utilities).
  3. Click the Erase tab.
  4. Select the disc from the list of drives on the left. Make sure not to select the hard disk.
  5. Click Erase.

CD-RW discs may deteriorate after being erased many times. Check the specifications for the disc to find out its expected life.


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