![]() ![]() ![]() 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.While holding down these keys, press the power. Release the "Power" button, reinsert the battery, and plug in your computer to a power source. Press and hold the Command + Option + P + R keys on your keyboard. Unplug the power adapter and remove the battery, then hold down the "Power" button for five seconds. If your Mac is running slowly or failing to load certain programs properly, a restart is the best way to make it work smoothly again. 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. Keep holding the keys down until you hear the Mac restart again. Laptop with non-removable battery - Shut down your computer and plug it into a power source. Hold down all of these keys: Command, Option (Alt), P and R, and turn on the Mac (it’s the same keys to reset the PRAM).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. Click the Apple logo, click Restart, click Restart again, press the Command + R keys together as soon as you hear the startup sound, and release the keys when. ![]() The SMC, or System Management Controller, handles many of the physical components on your Mac. ![]()
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