Command option shift power mac

Desktop Macs: Disconnect the power cord either from the Mac or from the AC outlet.

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Wait 15 seconds and plug it back in. Then wait another 5 seconds and turn the Mac back on.

Portable Macs with non-removable batteries: Shut down and unplug your Mac. On the built-in keyboard, press and hold the Shift, Option, and Control keys on the left side and press the power button and hold all of these down for 10 seconds, then release the keys. Connect the power adapter and then turn the Mac on normally. Portable Macs with removable batteries: Shut down your Mac. Guest User Sign In.

Frequently Asked Questions

Locate the following keys on the keyboard: Turn on your Mac. Press and hold the Command-Option-P-R keys immediately after you hear the startup sound. Hold these keys until the computer restarts and you hear the startup sound for a second time. Release the keys. After resetting NVRAM, you may need to reconfigure settings for speaker volume, screen resolution, startup disk selection, and time zone information.

If you are experiencing issues with powering on your computer, sleep, wake, charging your Mac notebook battery, or other power-related symptoms, you might need to reset the SMC instead. Before resetting the SMC: You should only do an SMC reset after you've tried all other standard troubleshooting. Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to see if the issue still occurs.

Press Command-Option-Escape to force quit any application that is not responding.

How to reset NVRAM

The keyboard backlight behaves incorrectly. Battery indicator lights, if present, behave incorrectly on Mac notebooks with a non-removable battery. The display backlight doesn't respond correctly to ambient light changes. Your Mac doesn't respond when you press the power button.

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Your Mac notebook doesn't respond properly when you close or open the lid. The battery doesn't charge properly. You'll lose unsaved work in any open applications.

How to Reset Your Mac's SMC and PRAM/NVRAM

Then press the power button again to turn on your Mac. Wake the computer after it's gone to sleep.

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If you're using a Mac notebook that's having power or battery issues, follow these steps: Unplug the power adapter from your Mac and the electrical outlet for several seconds, then plug it back in. After your Mac shuts down, remove and re-insert the battery if it's removable. Press the power button again to turn on your Mac. If the battery is nonremovable: After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time.