I have read Apple's SMC reset guide and I would like to clarify one or two points. In Apple's guide: "Unplug the computer's power cord." They don't specify which end. Is either ok? Or is it sufficient to turn off power at the power strip without unplugging anything? That is, is it the absence of AC power itself, rather than the power cord, that is the important thing? Also: are the timings given (15 seconds, then 5) absolutely critical? I am wondering if they are minimum times. At night power to the computer is switched off at the wall (our electricity sockets have on/off switches next to them - I am not sure whether that is typical in some other countries). When I power up the machine, more than 5 seconds has usually elapsed since the power at the wall was turned back on. Could this mean I have been resetting the SMC on a daily basis without knowing it? Finally, is there any way of interrogating the SMC to ask it when it was last reset? I mean, you carry out this procedure and there are no obvious signs that anything has happened. That's a bit unsatisfactory to me. Thanks!