#MACBOOK SERVICE BATTERY WARNING MAC#

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. ItвЂ™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.

#MACBOOK SERVICE BATTERY WARNING MAC#

If your Mac runs slowly even when Activity Monitor doesnвЂ™t show a lot of CPU usage, and youвЂ™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.

Selecting an external (instead of internal) video source for some iMac displays.

Status indicator light (SIL) management.

Responding to the display lid opening and closing on Mac notebooks.

Responding to presses of the power button.

HereвЂ™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 itвЂ™s turned on. Mac desktops, meanwhile, basically just need to be unplugged. Any Mac laptop made since 2009 doesnвЂ™t have a removable battery, meaning youвЂ™ll need a keyboard shortcut to get the job done.

The exact method for doing thisВ varies depending on your Mac.

Macbook service battery warning