解决方案:删除与网络配置有关的plist文件
打开 终端,输入
cd /Library/Preferences/SystemConfiguration/
sudo zip backup.zip \
com.apple.airport.preferences.plist \
com.apple.network.identification.plist \
com.apple.wifi.message-tracer.plist \
sudo rm -rf com.apple.airport.preferences.plist \
com.apple.network.identification.plist \
com.apple.wifi.message-tracer.plist \
NetworkInterfaces.plist preferences.plist