How to find your Mac's serial number

[iMore.com]

Need your Mac's serial number? If your Mac is awake, it's just one click to find it.
Your Mac serial number is important information: If you need to get your Mac serviced, you'll need it. If you call Apple for help, they may ask you for it. But if you haven't written it down and can't read the number off the case, don't worry: There's another easy way to get it.

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