Resetting SMC on an Older Mac Laptop With Removable Batteries Plug the power cable back in, then turn on your Mac.Keep all four buttons pressed down for ten seconds, then let go. Hold the left Shift+Control+Option keys down, then press and hold the power button down.Unplug the power, then shut down your Mac.If you have a MacBook without a removable battery, you can reset the SMC by turning on your computer while holding a specific keyboard shortcut. Update: If you have a newer Mac with an Apple T2 Security Chip (found in many Macs released in 2018 or later), you’ll need to use a slightly different process to reset your Mac’s SMC. Resetting the SMC on a Mac Laptop Without Removable Batteries But resetting the SMC works differently depending on whether you have one, so determine that before proceeding. Like we said: it’s been a long time since Apple laptops had removable batteries. Every MacBook Pro made after late 2009.
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If, however, you can see a crack outlining a rectangular section, and there’s some mechanism for opening something nearby, you’ve got a removable battery.Īccording to Apple, the following models do not offer a removable battery. If you see a single piece of metal, with no slider for removing the battery, your battery is not considered removable for the sake of this tutorial. It’s easy to determine whether your MacBook has a removable battery: just look at the bottom. Resetting the SMC works slightly differently on older MacBooks, which offered removable batteries. If your Mac runs slowly even when Activity Monitor doesn’t show a lot of CPU usage, and you’ve tried a number of other steps, resetting the SMC might help.
But problems with the SMC can also occasionally affect system performance. If any of these functions are behaving oddly, resetting the SMC could solve it.
Here’s a complete list of what the SMC does, straight from the Apple website : For example: when you plug in the power supply for your Mac laptop, the lights on the charger work even if your Mac is completely shut down. Some functionality of your Mac works regardless of whether it’s turned on.
Mac desktops, meanwhile, basically just need to be unplugged. Any Mac laptop made since 2009 doesn’t have a removable battery, meaning you’ll need a keyboard shortcut to get the job done. The illumination around the I/O ports on a Mac Pro (Late 2013) doesn't turn on when you move the computer.The exact method for doing this varies depending on your Mac.A Mac that supports target display mode doesn't switch into or out of target display mode as expected, or it switches into or out of target display mode at unexpected times.Your Mac performs unusually slowly, even though its CPU isn't under an abnormally heavy load.The MagSafe power adapter LED, if present, doesn't indicate the correct charging activity.Your MacBook or MacBook Pro doesn't recognize external devices that are connected to its built-in USB-C port.Your MacBook or MacBook Pro doesn't charge through its built-in USB-C port.Your Mac sleeps or shuts down unexpectedly and you can't turn it back on.Your Mac notebook doesn't respond properly when you close or open the lid.Your Mac doesn't respond when you press the power button.The display backlight doesn't respond correctly to ambient light changes.Battery indicator lights, if present, behave incorrectly on Mac notebooks with a non-removable battery.The status indicator light, if present, behaves incorrectly.The keyboard backlight behaves incorrectly.Your computer's fans run at high speed, even though it isn't under heavy usage and is properly ventilated.These symptoms might mean that an SMC reset is necessary:
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