System Management Controller: Difference between revisions

Revision as of 08:40, 17 June 2012

Revision as of 21:43, 17 June 2012

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==Overview==

The SMC controls power flow and fan speed, like the SMU before it. The main objective is to keep the machine running normally with a minimum ofminimal noise. It also enables enforcement of the Mac OS X End User License, allowing it to identify when it is running on non-Apple hardware,<ref>{{cite web|title=Interview with Andy Hall, Product Manager for Oracle VM VirtualBox|url=http://twit.tv/floss130}}</ref> although this can be circumvented by using third-party hacks.<ref name="artifactfix">{{cite web|url=http://www.macbreaker.com/2012/04/fix-hd-3000-artifacts-on-your.html|title=Fix screen artifacts on your Hackintosh|work=Fix screen artifacts on your Hackintosh|accessdate=17 June 2012}}</ref><ref name="netkasSMC">{{cite web|url=http://netkas.org/?cat=15|title=netkas.org » FakeSMC|accessdate=17 June 2012}}</ref>

The SMC should not normally need to be reset at all. Doing so however can be useful in [[troubleshooting]] certain issues.

*Failure to turn on

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*Failure to wake from sleep or unexpected sleep (note this can also be caused by [[operating system]] corruption)

*Failure to recognize keyboard and trackpad

*Failure to recognize battery

*Nonoperational LED Battery indicator

This is due to the fact the SMC may become corrupted over time and not respond properly to certain requests. This sort of corruption can be triggered by a power surge.