我在macOS Sierra上安装了MySql 5.7.12

支持文件位于

/usr/local/opt/mysql/support-files

只要将my-default.cnf复制到/etc/my.cnf或/etc/mysql/my.cnf，重新启动时配置就会被拾取。

MySQL 5.7 on Mac OS X El Capitan: /usr/local/mysql/etc/my.cnf

从/usr/local/mysql/support-files/my-default.cnf拷贝default conf文件

In my case, the file did not exist. In MySQL Workbench I went to OPTIONS FILE and found some default values. I clicked apply. It asked for permission. It then created the my.cnf file under /etc. However, it is very important to keep in mind that the first time you click "apply", you do not make any changes to the default configuration. Once the file has been created, you can make changes which will be applied when you click "apply". Otherwise you will not be shown the apply button when you make changes.

打开终端，使用以下命令:

sudo find / -name my.cnf

与所有这些伟大的答案相反。如果你在一个没有sudo权限的环境中工作。你的Homebrew可以安装在你的主目录下~如果是这种情况，你的mysql已经通过brew安装，安装mysql你的my.cnf可以位于~/ Homebrew /etc/my.cnf或者你也可以在你的home目录中查找。/ name 'my.cnf'

mysql 8.0.19，我终于找到my.cnf在这里: /usr/local/opt/mysql/.bottle/etc 我把它复制到 /usr/local/opt/mysql/ 并进行了修改。然后我重新启动mysql服务，它工作。