Try performing each thrice. It may take sometime, being certain you have the time to perform these resets. B. Try a New Charger: Power & Cables - Mac Accessories - Apple - Select " Mac Compatibility " on the left. Find the Right Power Adapter and Cable for your Mac Notebook - Apple Support. C.
After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds Step 1 Press and hold the Option key on your Mac, and click on the Apple menu in the top-left corner. From its drop-down list, select the System Information option. Step 2 On the left sidebar, under the Hardware section, click on the Power option. Then you can view various battery information on the right side. s2Ezl.