When will the Sudden Motion Sensor come into effect? After OS loading?

[Mic'sBook]

Just curious, I wonder when the SMS in the MacBook / MacBook Pro / MacBook Air will come into effect.

Will it work only after the Mac OS X is loaded (the Mac OS X Login screen)?
Or is it part of the System Management Controller (SMC), which handles low-level functions,
so it will still come into effect even without the Mac OS X?

Reference:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964?viewlocale=en_US

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Will Mac desktops (iMac, Mac mini, Mac Pro) have the sudden motion sensor in the future?
Just in case of earthquake... for what it's worth.

Thanks in advance! 🙂

 

[Arrandale]

Just curious, I wonder when the SMS in the MacBook / MacBook Pro / MacBook Air will come into effect.

Will it work only after the Mac OS X is loaded (the Mac OS X Login screen)?
Or is it part of the System Management Controller (SMC), which handles low-level functions,
so it will still come into effect even without the Mac OS X?

Reference:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964?viewlocale=en_US

==========

Will Mac desktops (iMac, Mac mini, Mac Pro) have the sudden motion sensor in the future?
Just in case of earthquake... for what it's worth.

Thanks in advance! 🙂

(i think, but am not sure that) the SMS works even when the laptop is powered off.
Carrying my laptop and turning it around I sometimes feel a mechanical swivel in there...