Apple says to unplug the MacBook before, then hold those buttons for 10 seconds, my first reply above says to plug it in, and doesn't say anything about holding the buttons!!!!! Sorry about that!!!! Please note that my first instructions above on resetting the SMC are BAD INSTRUCTIONS. I had previously done some fake SMC resets, according to bad instructions. That way the setpoint is memorized correctly." So how to fix? It's quite simple you need to do a SMC reset and cycle the battery a few times by fully discharging it and recharging it. What is happening here is SMC thinks the power level is below the set threshold so it needs to power down the system into deep sleep mode. " I bet you leave your system plugged in most of the time. Upon further, further research, (and I have the same problem with my notebook) I found this, and I'll just quote: I know a lot of technical /computer science stuff so if you need me to do try anything just tell me If you guys have any other Idea what else could cause this problem or more questions I would be glad to hear. Oh and as the device ist 3 Years old I guess I don't have any warranty anymore. Does anyone know if the Reseting without flushing the BootCamp partition can cause problems? I didnt want to wipe the whole disk so far because currently I can't reinstall Bootcamp and its sometimes the only way to use my Mac while I don't have power without being interrupted the whole time. I hope you can help me, I am really frustrated right now because you normaly don't expect something like that from such a device after 3 Years. sometimes if it shuts down once I restart it it shuts down again within one minute after login.it normally shuts around 90 % of battery.the Hardware Diagnostics did not find any error.Using Windows on the BootCamp partition works perfectly fine.erasing the partition again didnt help (no extra programs where installed after reset but it still happened).While playing for example CSGO (heavy using) it never has shut down.Most of the times it shuts down while using a Browser (but not always!). Disabling the Wifi reduces the probability of shutting down randomly.
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