最近几天电脑连wifi老是分配不到IP地址，之前偶尔出现，重启下电脑就好了。今天重启电脑也还不行，网上查下了，删除wifi缓存，重启电脑后不抽风，恢复正常了，Mark下。
删除以下5个文件即可，我是直接sudo move后再重启电脑。
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/Preferences/SystemConfiguration/com.apple.network.eapolclient.configuration.plist
/Library/Preferences/SystemConfiguration/com.apple.wifi.message-tracer.plist
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/SystemConfiguration/preferences.plist
# 添加.bak-日期后缀
mov() { sudo mv "$@"{,.bak-`date +%Y%m%d`}; echo "`date +%Y-%m-%d` moved at $PWD/$@"; };mov preferences.plist
preferences.plist → preferences.plist.bak-20230914
# 删除.bak-日期后缀
nbak(){ local tmp="$@"; echo ${tmp%.bak*} | xargs -t -I {} mv $tmp {};}; nbak preferences.plist.bak-20230914
preferences.plist.bak-20230914 → preferences.plist
