launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mariadb.plist
中内容：
<string>/usr/local/opt/mariadb/bin/mysqld_safe</string>
不要写成/usr/local/bin/mysqld_safe
mysql mac 上启动
原文：http://www.cnblogs.com/feika/p/4336135.html
