I bought my Macbook pro about a month ago and have been liking it ever since. But today i had something really wierd happen to me!

1 of the 4 USB-C ports were not letting me charge through it. After a while I wanted to restart the macbook because for some reason it was slow. After the macbook turned off, it didnt want to start up anymore, it said the battery was empty but when i restarted it it was 38%.

I managed to fix it by resetting SMC by holding shift-control-option and the power button for 10 seconds.

But i want to know what causes this to happen? For a new laptop its quite wierd for you to not be able to start it up. Especially a 3500 euro macbook.

Thanks in advance!


The System Management Controller is a subsystem responsible for power management as well as fan control. It is not unusual for it to get into an undefined state. Power spikes, i. e. can occur at any time and may influence the SMC.

So the question is not why or when it happens but how to resolve it. You have already posted the answer which is to perform a SMC reset. Therefore keep going with your MPB—there doesn’t appear to be any problem.

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  • I understand that its not really a problem, but i have owned a 1200 euro Acer laptop for 3,5 years and NEVER had such a problem. I just find it wierd that apple manages to put such thing in. I just dont understand why this is a problem for apple but not for windows laptops. – Granny Sep 7 '17 at 9:42
  • I can fully understand your concerns. However, rest assured there’s no indication that Apple builds less robust hardware that anyone else does. I’m sure this incident was simply a matter of coincidence. Still, 3500 Euros is definitely too much… – Tom E Sep 7 '17 at 9:45
  • So you are saying this isnt a common problem? It just happends every now and then? – Granny Sep 7 '17 at 9:50
  • Yes, that’s true—that’s my experience from roughly 10 years of teaching Apple service technicians. It happens every once in a while but since you can always correct it by resetting the SMC it never is a problem. – Tom E Sep 7 '17 at 9:58

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