© 2020 Yosemite Home Decor. All Rights Reserved. Powered by: k-eCommerce for SAP Business OneeCommerce for SAP Business One. Since Mac OS X 10.5, you need to use a third party piece of software to access the fan speed information. It appears no tool, installed by default on OS X, exposes this information through the terminal. The open source project Fan Control includes a command line tool that provides fan. Mac users interested in Fan control for os x 10.5.8 generally download: SSD Fan Control 2.13 Free SSD Fan Control is a fan management utility that comes in handy if you're dealing with a noisy hard disk fan.

Reset the SMC on computers that have the T2 chip

If your Mac has the Apple T2 Security Chip, follow these steps. If you need help, contact Apple Support.

Notebook computers with the T2 chip

Before resetting the SMC, try these steps:

Shut down your Mac.
Press and hold the power button for 10 seconds, then release the button.
Wait a few seconds, then press the power button to turn on your Mac.

If the issue persists, follow these steps to reset the SMC:

Shut down your Mac.
On your built-in keyboard, press and hold all of the following keys. Your Mac might turn on.
- Control on the left side of your keyboard
- Option (Alt) on the left side of your keyboard
- Shift on the right side of your keyboard
Keep holding all three keys for 7 seconds, then press and hold the power button as well. If your Mac is on, it will turn off as you hold the keys.
Keep holding all four keys for another 7 seconds, then release them.
Wait a few seconds, then press the power button to turn on your Mac.

Desktop computers with the T2 chip

Shut down your Mac, then unplug the power cable.
Wait 15 seconds, then plug the power cable back in.
Wait 5 seconds, then press the power button to turn on your Mac.

Reset the SMC on other computers

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If your Mac doesn't have the Apple T2 Security Chip, follow these steps. If you need help, contact Apple Support.

Notebook computers with a non-removable battery

This applies to MacBook Pro models introduced in mid-2009 to 2017, MacBook Air models introduced in 2017 or earlier, and all MacBook models, except the MacBook (13-inch, Mid 2009).

Shut down your Mac.
On your built-in keyboard, press and hold all of these keys:
- Shift on the left side of your keyboard
- Control on the left side of your keyboard
- Option (Alt) on the left side of your keyboard
While holding all three keys, press and hold the power button as well.
Keep holding all four keys for 10 seconds.
Release all keys, then press the power button to turn on your Mac.

Notebook computers with a battery that can be removed

This applies to all MacBook Pro and MacBook models introduced in early 2009 or earlier, as well as the MacBook (13-inch, Mid 2009).

Shut down your Mac.
Remove the battery. (If you need help removing it, contact an Apple Store or Apple Authorised Service Provider.)
Press and hold the power button for 5 seconds.
Reinstall the battery.
Press the power button to turn on your Mac.

Desktop computers

Shut down your Mac, then unplug the power cable.
Wait 15 seconds, then plug the power cable back in.
Wait 5 seconds, then press the power button to turn on your Mac.

About the SMC

The system management controller is responsible for managing behaviours related to these features:

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Power, including the power button and power to the USB ports
Battery and charging
Fans and other thermal-management features
Indicators or sensors such as status indicator lights (sleep status, battery charging status and others), the sudden motion sensor, the ambient light sensor and keyboard back-lighting
Behaviour when opening and closing the lid of a notebook computer

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Resetting the SMC doesn't affect the contents of NVRAM or PRAM.