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My SMC on my 2012 mbp keeps corrupting even after I reset it.

It won't wake up, forcing me to open it up, unplug and plug in the battery every once-in-a-while, which is becoming a problem because I can't do that in school.

Does anyone know anything about how to stop my SMC from corrupting?


My SMC is corrupting hourly now. This is a big problem. Can anyone please help me.

  • This is becoming a big problem, and I'm having to reset it constantly. Is there a permanent fix for this? – Sam Nov 22 '18 at 16:41
  • How did you determine that your SMC is corrupted? – Allan Dec 4 '18 at 12:36
  • From here @Allan apple.stackexchange.com/q/340748/305111 – Sam Dec 4 '18 at 14:54
  • That's not a diagnostic for a corrupt SMC. Are you saying you're having brightness issues? – Allan Dec 4 '18 at 15:55
  • No, I also am having waking up from sleep issues, and a couple of other issues that Apple mentions. Also, resetting my SMC fixes the problem, at least temporarily – Sam Dec 4 '18 at 15:58
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SMC problems could be related to the battery itself. That age of laptop doesn't have a separate battery - as in the average non-Apple motherboard which has a CMOS battery on the motherboard, so SMC would be using battery power to store settings.

If the battery's shot, SMC loses it's settings at whatever point the battery drains itself.

See if you can borrow another of the same model with a healthy-ish battery to test with for a bit...

  • I have two identical computers, this is happening to both. Unfortunately (which kinda makes sense why this is happening now) neither have batteries :/ one of them died yesterday. Would it make sense then that when they are plugged in, after restarting with no battery, that there are SMC problems? – Sam Nov 23 '18 at 3:24
  • if the SMC settings are getting dropped every time the battery drains itself, then yeah, it would try to rebuild them on the next restart(which probably looks like it restarting a bunch of times on its own, then finally figuring it out and starting up). plugged in would only hold the settings as long as it's powered on, since there's no backup battery for those settings. – s1ns3nt Nov 23 '18 at 16:13
  • Ok, thanks. Part of the problem may be that the hdd isn't actually working properly :/ – Sam Nov 24 '18 at 5:14

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