Resetting the system management controller (SMC) can resolve certain issues related to power, battery, fans, and other features.
This article applies only to Mac computers with an Intel processor.
If your Mac has the Apple T2 Security Chip, follow these steps. If you need help, contact Apple Support.
Before resetting the SMC, try these steps:
If the issue persists, follow these steps to reset the SMC:
If your Mac doesn't have the Apple T2 Security Chip, follow these steps. If you need help, contact Apple Support.
This applies to MacBook Pro models introduced in mid-2009 through 2017, MacBook Air models introduced in 2017 or earlier, and all MacBook models except the MacBook (13-inch, Mid 2009).
This applies to all MacBook Pro and MacBook models introduced in early 2009 or earlier, as well as the MacBook (13-inch, Mid 2009).
The system management controller is responsible for managing behaviours related to these features:
Resetting the SMC doesn't affect the contents of NVRAM or PRAM.
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