Follow these steps on your Mac if a blank optical disc (such as a CD-R, CD-RW, or DVD-R) doesn't appear on the desktop or in the Finder after you insert it.
Choose Apple menu () > System Preferences, then click CDs & DVDs.
If you don’t have an optical drive built into or connected to your Mac, CDs & DVDs preferences aren’t available.
* Apps such as iTunes and Disk Utility can still access the disc, even if it doesn't appear on the desktop or in the Finder.