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There are only a few components in an iMac that can make clicking noises. It's highly unlikely that it's your logic board or a component of your logic board, but the possibilities are: Power Supply Hard Drive Speakers CPU Fan I've included a sample picture and the location of the components in the picture below Power Supply There are a number of ...


I'd recommend you try the exciting new (and free) TurboBoost Switcher, which disables Intel's Turbo Boost. This means your MacBook Pro will overheat far less often. You can also boost fan speed preemptively with SMCMac or iStat menus.

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