Answer to: Button makes electronic "click" sound when pressedNow that my trackpad stopped clicking by itself, I'm not sure what's going on. It seems the button to select" clicker" in system preferences enables the trackpad to behave like the select button below it.
Answer to: Button makes electronic "click" sound when pressedIf you look in System Preferences>Track Pad>Clicker you'll find the solution. Clicks like the clickwheel on an ipod. OR not, depends on the setting.