Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Plain and simple here: about one week ago, my MacBook Pro stopped adhering to its wake schedule. I have had it set to wake every weekday at 6 a.m. for as long as I can remember. It has done so with 100% reliability as long as a power source is plugged in and the lid is open. Then it stopped. I finally went and checked the power savings pref pane this morning, and all is right with the world. I tweak my computer all the time, but have not done anything with this setting, nor have I installed anything that was advertised to affect power management. That being said, should I reset the SMC? This doesn't really seem to fall under what apple would normally recommend this for.


share|improve this question

This could be related to the SMC or the PRAM. The System Management Controller controls everything related to power on your Mac. I would reset this first, and then reset the PRAM right after. Let us know if that works. You may have to reset the sleep schedule after resetting the PRAM.

share|improve this answer
I'll reset SMC tonight and see if that does anything before I reset PRAM. I'll post tomorrow with an update. – soxman Jan 25 '12 at 18:24
Spontaneous remission. I woke up this morning and it was on, as scheduled, without resetting SMC. Not sure what's up, but thanks for the reply, and I'll definitely give SMC reset a go if it acts up again. – soxman Jan 27 '12 at 6:09

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.