在Mac 电脑中， md 相关的几个进程 CPU占用很高。
这几个进程都是为了处理Spotlight索引，可以进行关闭
关闭
sudo mdutil -a -i off
打开
sudo mdutil -a -I on
如果不起作用可以尝试下面方法：
关闭spotlight的命令：
launchctl unload -w /System/Library/LaunchAgents/com.apple.Spotlight.plist
sudo launchctl unload -w /System/Library/LaunchAgents/com.apple.Spotlight.Root.plist
开启：
launchctl load -w /System/Library/LaunchAgents/com.apple.Spotlight.plist
sudo launchctl load -w /System/Library/LaunchAgents/com.apple.Spotlight.Root.plist
关闭mds_stores的命令：
launchctl unload -w /System/Library/LaunchAgents/com.apple.mds.plist
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.metadata.mds.Root.plist
开启：
launchctl unload -w /System/Library/LaunchAgents/com.apple.mds.plist
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist）