我安装了（因为我需要它们）mysql（因此8.0）和mysql@5.7通过自制软件在MBP苹果M2 w/ Ventura 13.3.1
我正确地设置了（第一次）mysql安装;
现在我切换到mysql@5.7：首先，我注意到它没有安装一个适当的数据库（或者它使用的是相同的其他公式...？！！）并遇到了臭名昭著的ERROR 2002（HY 000）：通过brew services restart mysql@5.7设置服务后，无法通过socket '/tmp/mysql.sock'（2）连接到本地MySQL服务器
问题：启动文件名称不同，但某些参数设置相同（datadir和WorkingDirectory）;我可以安全地改变这些然后...？（我还注意到，每次我通过brew services stop xxx停止每个服务时，相应的文件随后都被删除了！所以它一定来自某处）
基本上，我希望在5.7版本中使用**/opt/homebrew/var/mysql@5.7**;那我该怎么办？（特别是我也需要为5. 7建立一个新的数据库...）
由于我对这个领域很陌生，我开始在这里浏览各种主题。https://superuser.com/questions/1333504/brew-install-mysql5-7-cant-connect-to-local-mysql-server-through-socketbrew start and brew restart wont start service和其他一些，它不可避免地以recommandation结束，以完全清除所有与mysql相关的东西，并重新安装只有一个版本（这不是我想要的）。
对于mysql：

me@localhost ~ % more ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>KeepAlive</key>
        <true/>
        <key>Label</key>
        <string>homebrew.mxcl.mysql</string>
        <key>LimitLoadToSessionType</key>
        <array>
                <string>Aqua</string>
                <string>Background</string>
                <string>LoginWindow</string>
                <string>StandardIO</string>
                <string>System</string>
        </array>
        <key>ProgramArguments</key>
        <array>
                <string>/opt/homebrew/opt/mysql/bin/mysqld_safe</string>
                <string>--datadir=/opt/homebrew/var/mysql</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>WorkingDirectory</key>
        <string>/opt/homebrew/var/mysql</string>
</dict>
</plist>

对于mysql@5.7：

me@localhost ~ % more ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
/Users/me/Library/LaunchAgents/homebrew.mxcl.mysql.plist: No such file or directory
me@localhost ~ % more ~/Library/LaunchAgents/homebrew.mxcl.mysql@5.7.plist 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>KeepAlive</key>
        <true/>
        <key>Label</key>
        <string>homebrew.mxcl.mysql@5.7</string>
        <key>LimitLoadToSessionType</key>
        <array>
                <string>Aqua</string>
                <string>Background</string>
                <string>LoginWindow</string>
                <string>StandardIO</string>
                <string>System</string>
        </array>
        <key>ProgramArguments</key>
        <array>
                <string>/opt/homebrew/opt/mysql@5.7/bin/mysqld_safe</string>
                <string>--datadir=/opt/homebrew/var/mysql</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>WorkingDirectory</key>
        <string>/opt/homebrew/var/mysql</string>
</dict>
</plist>

PS：当我修改上述文件时，启动服务失败（顺便说一句，文件被覆盖...）：

me@localhost ~ % brew services start mysql@5.7
Bootstrap failed: 5: Input/output error
Try re-running the command as root for richer errors.
Error: Failure while executing; `/bin/launchctl bootstrap gui/503 /Users/me/Library/LaunchAgents/homebrew.mxcl.mysql@5.7.plist` exited with 5.