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.​

The application “” can’t be opened

"The application “” can’t be opened." Note that this differs from the "SomeApp can't be opened because it was not downloaded from the Mac App Store" or "SomeApp can’t be opened because it is from an unidentified developer” message that is the result of Gatekeeper settings.

How to Disable Boot on Lid Open on MacBook Pro (Late 2016 Models)

Disable Boot on Lid Open / Power Connection on MacBook Pro (2016+)å≈

  1. sudo nvram AutoBoot=%00

Return to Default Setting of Booting on Lid Open with MacBook Pro