A Hot Topic item on Apple's Discussion Boards deals with problems getting sound from an audio CD played on a Mac.various points are covered. Here is one tidbit that caught my eye (confirming a previous report here at MacFixIt): "Under OS 8, there is a specific issue with Power Macintosh 6100, 7100, and 8100 models, where the Monitors & Sound control panel does not retain this setting through a restart. To deal with this, you can add the Sound control panel via a Custom Install (or it may already be in your Apple Extras folder), and use it to set this option. There is no problem keeping both control panels installed."
iPhone running slow?
Here are some quick fixes for some of the most common problem in iOS 7.