![]() Wait five seconds, then press the "Power" button. ![]() Wait fifteen seconds, then plug it back in. Desktop - Shut down the iMac and unplug the power cord. Show Dialog with Restart, Sleep & Shutdown Options, Hold Ctrl and press the Eject key or Power button (or hold the Power button for a few seconds and the.Release the "Power" button, reinsert the battery, and plug in your computer to a power source. Unplug the power adapter and remove the battery, then hold down the "Power" button for five seconds. Laptop with removable battery - Shut down your computer. ![]() Using the left side of the built-in keyboard, hold down ⇧ Shift + Control + ⌥ Option while pressing the "Power" button, then release all keys, and finally press the "Power" button again. Laptop with non-removable battery - Shut down your computer and plug it into a power source.If none of the steps above solved your problem, reset the SMC: X Research source An issue with the SMC can prevent your power button from working properly, or cause general slowdowns. ![]() The SMC, or System Management Controller, handles many of the physical components on your Mac. ![]()
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