我不知道你使用的是哪个版本的MySQL，但以下是Mac OS X 5.5版本my.cnf文件的可能位置(从这里取):

/etc/my.cnf /etc/mysql/my.cnf SYSCONFDIR / my.cnf $ MYSQL_HOME / my.cnf Defaults-extra-file(使用——Defaults-extra-file =path指定的文件，如果有的话) ~ / .my.cnf

Mac OS X Mavericks的当前MySQL包(在撰写本文时为MySQL -5.6.17-osx10.7-x86_64)在安装期间自动创建my.cnf。

它位于/usr/local/mysql-5.6.17-osx10.7-x86_64/my.cnf 根据您的版本调整路径。

将/usr/local/opt/mysql/support-files/my-default.cnf复制为/etc/my.cnf或/etc/mysql/my.cnf，然后重启mysql。

在Mac OS X Maverick的情况下，当MySQL通过Homebrew安装时，它位于/usr/local/opt/mysql/my.cnf

您可以检查文件

/usr/local/bin/mysql.服务器，看看my.conf是从哪里读取的。

通常是从/etc/my.cnf或~/my.cnf或~/.my.cnf

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.