My wife's 2015 MacBook Pro makes this weird click sound upon opening safari for the fist time. It sounds like a click or a pop. I initially thought it was only Safari that this happened to but it appears to happen with other apps after the machine has been sitting idle for a while. Its like a small single click is heard and that's it. This is a 15" MacBook Pro. Any ideas on what this could be or if it its anything to be concerned with? Thanks!
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