mysql binary launchd plist

com.mysql.mysqld.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>com.mysql.mysqld</string>
    <key>Program</key>
    <string>/usr/local/mysql/bin/mysqld_safe</string>
    <key>RunAtLoad</key>
    <true/>
    <key>UserName</key>
    <string>mysql</string>
    <key>WorkingDirectory</key>
    <string>/usr/local/mysql</string>
</dict>
</plist>

install.sh

# After installing MySQL from the binary DMG, download and install MySQL launchctl startup item:
cd /Library/LaunchDaemons
sudo curl -O http://gist.github.com/raw/249291/bcd9de530c5a0922b374582f29e5ec99388975f2/com.mysql.mysqld.plist
sudo launchctl load com.mysql.mysqld.plist

# Test your mysql installation is working (optional)
mysql -uroot