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The '''System Management Controller''' ('''SMC''') is a subsystem of [[Intel]] processor-based [[Macintosh]] computers. It is similar in function to the older [[System Management Unit|SMU]] or [[Power Management Unit|PMU]] of non-Intel Macintosh computers.<ref>{{cite web |title=HT2368: About the SMC Firmware Updates |url=http://support.apple.com:80/kb/HT2368?viewlocale=en_US |website=Official Apple Support
==Overview==
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