我正在运行MacOS Catalina(10.15.3)，并在/usr/local/etc中找到my.cnf

/private/etc/my.cnf for Catalina

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.

为我在sierra版本

复制默认配置:

/usr/local/Cellar/mysql/5.6.27/support-files / my-default.cnf

to

/usr/local/Cellar/mysql/5.6.27/my.cnf

你可以在任何你想要的目录下创建你的文件。创建完成后，你可以“告诉”mysql配置的路径:

macOS High Sierra 版本10.13.6

mysql Ver 14.14 Distrib 5.7.22，用于osx10.13 (x86_64)使用EditLine包装器 版权所有(c) 2000,2018, Oracle和/或其关联公司。版权所有

默认选项按给定顺序从以下文件中读取:

/etc/my.cnf 
/etc/mysql/my.cnf 
/usr/local/etc/my.cnf 
~/.my.cnf