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Dec 11, 2013 6:01 PM in response to rabeach1by John Galt,Power or other problems related to unexpected system sleep, shutdown, lights or fans justify an SMC reset. Read all the steps. If directions to use Restart or Shut Down from the menu do not work then force the MBP to shut down by holding its power switch depressed long enough for it to shut down.
Before Resetting the SMC
Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to determine if the issue still occurs.
- Press Command + Option + Escape to force quit any application that is not responding.
- Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosing Sleep. Wake the computer after it has gone to sleep.
- Restart your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
- Shut down your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.
Resetting the SMC on Mac portables with a battery you can remove
- Shut down the computer.
- Disconnect the MagSafe power adapter from the computer, if it's connected.
- Remove the battery (to remove the battery - click here: MacBook or MacBook Pro).
- Press and hold the power button for 5 seconds.
- Release the power button.
- Reconnect the battery and MagSafe power adapter.
- Press the power button to turn on the computer.
Still having problems? Replace steps 6 and 7 with the following:
- Reconnect just the MagSafe power adapter.
- Press the power button to turn on the computer,
- Then reconnect the battery.
Resetting the SMC on portables with a battery you should not remove on your own
- Shut down the computer.
- Plug in the MagSafe power adapter to a power source, connecting it to the Mac if it's not already connected.
- On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time. The power adapter indicator light will cycle off / on once.
- Release all the keys and the power button at the same time.
- Press the power button to turn on the computer.
If the problem remains unresolved after completing the above please determine if the problems also occur in "Safe Mode":
- Safe Mode or "Safe Boot" is a troubleshooting mode that bypasses all third party system extensions and loads only required system components. Read about it: Starting up in Safe Mode
- You must disable FileVault before you can start your Mac in Safe Mode.
- Starting your Mac in Safe Mode will take longer than usual, graphics will not render smoothly, audio is disabled on some Macs, and some programs (iTunes for example) may not work at all.
- Merely starting your Mac in Safe Mode is not intended to resolve the problem, it's to observe its performance without certain additional components.
- To end Safe Mode restart your Mac normally. Shutdown will take longer as well.
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Apr 17, 2016 1:02 PM in response to rabeach1by EdwardMetzler,I finally figured out how to reboot my machine. First I powered off by holding down the power button for 5 sec. Then, turned it back on until I reached the login screen. At the bottom are buttons to shutdown or restart. I chose restart and that worked. Then the OS update would work. Hope this helps.