Q: why won't my mac read any audio cd's?

Hi daddio9819,

Welcome to the Apple Support Communities!

I understand that your iMac is not mounting your audio CDs. In this situation, I would recommend working through the troubleshooting steps located in the attached article.

Get help with the slot-loading SuperDrive on your Mac computer - Apple Support

Accepts discs but they don't mount or are automatically ejected

1. Make sure the drive is not placed upside down. The aluminum enclosure should be facing up as shown in section 1.
2. Check the disc's surface for scratches and dirt, since these things can prevent the disc from appearing on the desktop.
3. Connect the MacBook Air SuperDrive directly to the computer's USB port instead a USB hub.
4. Reset the System Management Controller (SMC).
5. Ensure your drive can read the specific type of disc being used. The System Profiler or System Information may provide additional information regarding what media your computer supports.
• OS X Snow Leopard v10.6 or earlier: Open Apple System Profiler by choosing "About this Mac" from the Apple () menu. Then, click More Info.
• OS X Lion v10.7 and later: Click the Apple () menu and then hold down the Option key. Choose System Information from the menu.
6. If the disc continues to not be recognized, contact Apple or an Apple Authorized Service Provider, or make an appointment with an Apple Retail Store.

Have a great day,

Joe