battery

How to Calibrate Your MacBook, MacBook Pro, or MacBook Air Battery

1.Start by ensuring your Mac is fully charged. Don't go by the battery menu item; instead, plug in the power adapter and charge your Mac until the light ring at the charging jack or the power adapter's light turn green, and the onscreen battery menu indicates a full charge.

2.Once the battery is fully charged, continue to run your Mac from the AC adapter for two hours. You can use your Mac during this time; just be sure the power adapter is plugged in and you're running off AC power and not Mac's battery.‚Äč