my computer says it can not find my cd burner

i have always been able to burn music cds but today my computer says it can not find my cd burner


iMac (24-inch Early 2009), OS X Yosemite (10.10.5), computer can't find my cd burner,
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Hi Paul,

It sounds like you're having some trouble with your Mac recognizing your optical drive. I know it's important to make sure everything is working as expected with your Mac hardware, and I want to help.

Is this an internal optical drive, or an external USB drive?

Let's try to reset the System Management Controller. Unplug all accessories from your iMac, and follow the steps here:
How to reset the System Management Controller (SMC) on your Mac - Apple Support

Let me know if that helps.

Thanks for using the Apple Support communities.

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