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If you’re experiencing performance issues with your Mac that normal troubleshooting methods cannot solve, resetting the SMC (System Management Controller) could be the solution. The SMC stores settings related to power and temperature management, and resetting it can resolve issues with both noise and performance.
The process of resetting the SMC depends on the type of Mac you are using and whether or not it has a removable battery. Here’s how to reset the SMC on different types of Mac:
Desktop Macs
Follow these steps to reset the SMC on an iMac, iMac Pro or Mac mini:
- Shut down the computer.
- Unplug the power cord.
- Wait 15 seconds.
- Reconnect the power cord.
- Wait 5 seconds, then press the power button to turn on the computer.
Recent MacBooks (with non-removable batteries)
Follow these steps to reset the SMC on a MacBook if the battery cannot be removed. That includes all MacBook Airs and MacBook and MacBook Pros from 2009 or later:
- Shut down the computer.
- Unplug the power cord.
- On the built-in keyboard, hold down the Left (Shift), Ctrl and Option (Alt) keys and the Power button simultaneously. Hold all of them down for 10 seconds.
- Release all keys and the power button at the same time.
- Press the power button to turn on the computer.
Note: The LED on your MagSafe Power Adapter can change status or turn off briefly when you reset the SMC.
Older MacBooks (with removable batteries)
Follow these steps to reset the SMC on a MacBook with a removable battery:
- Shut down the computer.
- Unplug the power cord.
- Remove the battery.
- Press and hold the power button for 5 seconds, then release it.
- Replace the battery.
- Reconnect the power cord.
- Turn the MacBook back on.
If resetting the SMC does not resolve your issue, consider contacting Apple Support for further assistance.
FAQs
1. What is the SMC on a Mac?
The SMC (System Management Controller) on a Mac is responsible for controlling and managing various hardware functions and settings. These include battery management, cooling fan settings, power management, and more.
2. Is resetting the SMC safe?
Yes, resetting the SMC on a Mac is safe and can resolve many performance issues. However, if the issue persists after resetting the SMC, it’s recommended to contact Apple Support for further assistance.