Resetting the SMC can resolve some computer issues such as not starting up, not displaying video, sleep issues, fan noise issues, and so forth. This functionality has been replaced by the SMC. Unlike models of Power Mac G5 or Power Mac G4 computer, the Mac Pro computer does not have a PMU. Note: Mac Pro (Early 2008) does not have an SMC_RST switch, refer to the reset procedure steps in the previous section.

Use a non-metallic, non-conductive object, such as a wooden pencil. Press the SMC_RST switch that is located slightly below and to the right of the row of diagnostic LEDs.Open and remove the metallic outer door.Press the power button to start up your computer.Īnother way to reset the SMC on a Mac Pro computer is:.Then reconnect your keyboard and mouse to the computer. Plug the power cord back in, making sure the power button is not being pressed at the time.Unplug all cables from the computer, including the power cord and any display cables.

From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).

If your computer still exhibits these types of issues after you've restarted the computer, try resetting the SMC.

Force Shut Down (press the power button for 10 seconds).

If your computer isn't responding, perform these steps one at a time, in this order, until the issue has been resolved: Resetting the SMC will not resolve issues in which your computer is unresponsivein these situations, restarting your computer will generally suffice. Note that resetting the SMC does not reset the PRAM.

Handling system resets from various commands.

Telling the computer when to turn on, turn off, sleep, wake, idle, and so forth.

The SMC controls several functions, including: If your computer is experiencing any power issue, resetting the SMC may resolve it. The System Management Controller (SMC) is a chip on the logic board that controls all power functions for your computer.

Smc fan control settings mac pro