未知原因，mac系统中mysql启动不了。。

mysql.server start

dyld: Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib
  Referenced from: /usr/local/Cellar/mysql/5.7.13/bin/my_print_defaults
  Reason: image not found
Starting MySQL
. ERROR! The server quit without updating PID file (/usr/local/var/mysql/bogon.pid).

检查了下，命令没问题， .zshrc 中配置如下

alias db="mysql -uroot -pabcd.1234"

dyld: Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib
  Referenced from: /usr/local/bin/mysql
  Reason: image not found
[1]    50798 abort      mysql -uroot -pabcd.1234

检查Mysql启动问题

launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist

/Users/xxx/Library/LaunchAgents/homebrew.mxcl.mysql.plist: service already loaded

搜索。。

得知可能原因：安装python3后导致openssl升级，而mysqldump还依赖1.0.0

执行命令：

brew switch openssl 1.0.2q

问题解决。