Im unable to change my iMacs alert sound. When I go to System Preferences > Sound > Play alerts and sound effects through: The Internal Speakers choice is grayed out. If I click on any alert sound, nothing changes. The alert stays the same chirping sound. Under Output I have Internal speakers Built-in Output selected. Any one know what I need to do to fix this?
iMac 2.66 GHz Intel Core 2 Duo, OS X v.10.5.8
iMac 2.66 GHz Intel Core 2 Duo, OS X v.10.5.8