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Apple Computing Products:
macOS - Desktop Hardware
Hardware test
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<blockquote data-quote="chscag" data-source="post: 1613006" data-attributes="member: 46727"><p>Good advice from Nick but I thought I would also add that your iMac has three fans: CPU, Optical Drive, and Hard Drive. The fan you hear is likely the one for the CPU.</p></blockquote><p></p>
[QUOTE="chscag, post: 1613006, member: 46727"] Good advice from Nick but I thought I would also add that your iMac has three fans: CPU, Optical Drive, and Hard Drive. The fan you hear is likely the one for the CPU. [/QUOTE]
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Apple Computing Products:
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Hardware test
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