卸载MySQL。 删除/usr/local/var/mysql/. 安装MySQL。

正如其他人指出的，这是因为MySQL已经安装，但服务没有运行。启动MySQL服务的方法有很多种，对我有用的方法如下。

启动服务。

转到“系统首选项” 在底部窗格中应该有MySql图标。 双击启动“MySQL服务器状态”，按下“启动MySQL服务器”按钮

我的环境：

Mac Yosemite 10.10.3

安装包:/Volumes/mysql-advanced-5.6.24-osx10.8-x86_64

在我的mac m1 macOS Monterey上安装MySQL后，使用brew安装MySQL，我得到了以下信息:

[System] [MY-013169] [Server] /opt/homebrew/Cellar/mysql/8.0.27_1/bin/mysqld (mysqld 8.0.27) initializing of server in progress as process 3624

[ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.

[ERROR] [MY-013236] [Server] The designated data directory /opt/homebrew/var/mysql/ is unusable. You can remove all files that the server added to it.

[ERROR] [MY-010119] [Server] Aborting

[System] [MY-010910] [Server] /opt/homebrew/Cellar/mysql/8.0.27_1/bin/mysqld: Shutdown complete (mysqld 8.0.27)  Homebrew.

还有这个警告:

Warning: The post-install step did not complete successfully You can
try again using:   brew postinstall mysql

之后，我尝试使用brew services启动MySQL，我得到了这个错误:

ERROR 2002 (HY000): Can't connect to local MySQL server through socket
'/tmp/mysql.sock' (2)

我设法修复它使用:

> rm -rf ~/opt/homebrew/var/mysql/
> brew postinstall mysql

现在您可以使用mysql -uroot或mysql -uroot -p连接。

试试这个

rm -rf /usr/local/var/mysql && brew postinstall mysql@5.7 && brew services restart mysql@5.7

如果你在OSX和XAMPP上，那么请遵循以下步骤:

感谢Jackstine的回答，我得以做到以下几点:

$ cat ~/.my.cnf

[mysql]

# CLIENT #
port                           = 3306
socket                         = /Applications/XAMPP/xamppfiles/var/mysql/mysql.sock

我希望这能在我将来忘记的时候再次帮助我!

只有这一点让我成功了 酿造服务启动——全部启动 (试完所有答案后)