![]() After waiting five seconds, power on the computer. Release the power button, replace the battery and reconnect the power adapter, and power on the computer.ĭesktop Macs require you to shut down the computer, unplug the power cord and wait 15 seconds before attaching the power cord again. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. Still no resolve - move onto Step 7 and follow instructions therein. These are the four keys - the command, the option, the letter P, and the letter R. Step 3: Now, press and hold down keys 'Command + Options + P + R' the right away. Step 2: Next, turn your system back on in a while. How to reset the SMC on a MacBook For MacBook users, the SMC reset method differs depending on whether the MacBook has an Apple T2 Security Chip. Step 1: To begin with the process shut down your system. ![]() Wait 15 seconds and plug the power cord back in. ![]() Still having issues, move onto Steps 5 and 6 and Test Again. How to reset the SMC on desktop Macs (iMac, Mac mini, Mac Pro) Shut down your Mac and unplug the power cord. If you're using a MacBook with a removable battery, disconnect the power adapter, shut down the computer, remove the battery, and press and hold the power button for five seconds. Suggest the User start with Points 1 to 4 and then Test. The power light on your charger might change colors while you reset the SMC. MacBook models with batteries you shouldn't remove on your own require you to connect the power adapter, shut down the computer and hold the left side "Shift-Control-Option" keys simultaneously. The SMC controls the power button response, battery management, sleep settings, thermal management, lighting settings and video source selection. Resetting the SMC restores the default settings related to low-level functions that you generally can't modify in System Preferences.
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