IMac 27" CD Drive not recognizing CD's that I put in...?

About 20% of the time I put an audio CD into my drive it doesn't show up on the desktop at all, it doesn't show up in iTunes 10, and it doesn't show up in the finder... I push the eject button on the keyboard to manually eject but it does not work. I have to restart my BRAND NEW iMAC everytime and it usually will recognize it after that... I'm new to the Mac (converted from PC) so I'm not sure what the proper procedure is to do when this happens, nor why it is happening? Do I need to take my iMac back for warranty issues or what is going on?
Thanks to anyone with a logical insight...
--Paul
Message was edited by: yo_paisan

Hi Paul
Welcome to Apple Support Communities
I can't fully explain what is happening with some music CDs, but I am getting the same thing on a nearly 5 year old Intel iMac running 10.6.4. All of my CDs are either new, clean of smudges, no scratches and I get just about the same 20% or so that fail to mount.
Open Disk Utility in Applications > Utilities and them put in one of those CDs that your iMac is having trouble seeing. Then if and when you see the grayed out CD under the DVD drive, highlight it and click the blue Mount button on the Disk Utility tool bar.
For me all of the CDs that previously failed to read, mount and eject, then mounted on the desktop, opened iTunes and worked perfectly once mounted using Disk Utility....
maybe a 10.6.4 bug, but I can't prove it... maybe just hard to read CDs...?
Dennis

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