mac 安装mysql. 使用brew install mysql 报错

question：

   

　　tar: Error opening archive: Failed to open '/Users/......

   answer:

     如图，安装six依赖时报错，那就单独安装six依赖包， brew install six。

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question:

.Logging to '/usr/local/var/mysql/leodeMacBook-Pro.local.err'.

 ERROR! The server quit without updating PID file (/usr/local/var/mysql/leodeMacBook-Pro.local.pid).

answer:

https://blog.csdn.net/baodongdong123/article/details/59576532