If you are running Snow Leopard, and have CD Spin Doctor installed, an error message may periodically pop up claiming that the CDSDAudioCaptureSupport.kext "file was installed improperly and cannot be used." This message will appear at various times, whether or not Spin Doctor is running. To put an end to it, update to the latest version of Spin Doctor. Then launch Spin Doctor and select "Install Audio Capture Support" from the CD Spin Doctor menu. This updates the kext file (located in the /System/Library/Extensions folder) to a version that is compatible with Snow Leopard.

The kext file itself is required if you want to use CD Spin Doctor's "Audio Music Capture" option. This allows you to "instantly" start recording whatever audio is currently playing on your Mac. Unfortunately, even with everything updated and even after successfully using the option to do an audio capture, I could not get Spin Doctor to export the audio to iTunes--via the iTunes button in Spin Doctor's toolbar. Everything seemed to work as intended, but no file ever showed up in iTunes.

Maybe there is a solution for this. I've stopped caring. For me, there are just too many obstacles to overcome with CD Spin Doctor. I have moved on and I now record music with other audio software.