MacBook Pro 2017 无Bar （A1708）
在用USB C口给iPad充电时，突然系统重启，随后USB C口失效，另一个USB C口正常。
尝试重置系统管理控制器，故障解决。
以下为官方操作：https://support.apple.com/en-us/HT201295
How to reset the SMC on Mac notebooks
If you have a MacBook Pro (2018), skip ahead to the section that deals with your Mac.
To reset the SMC on a Mac notebook, first determine whether the battery is removable. Most older Mac notebooks have removable batteries. Mac notebooks that have nonremovable batteries include MacBook Pro (Early 2009 and later), all models of MacBook Air, MacBook (Late 2009), and MacBook (Retina, 12-inch, Early 2015 and later). Learn more about Mac notebook batteries.
If the battery is nonremovable:
- Choose Apple menu > Shut Down.
- 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. If you have a MacBook Pro with Touch ID, the Touch ID button is also the power button.
- Release all keys.
- Press the power button again to turn on your Mac.
If the battery is removable:
- Shut down your Mac.
- Remove the battery. If you need help removing the battery, contact an Apple Authorized Service Provider or Apple Retail Store.
- Press and hold the power button for 5 seconds.
- Reinstall the battery.
- Press the power button again to turn on your Mac.
