OS X的蛋痛特性是 `launched 。如果你需要修改sshd的监听端口，那么

编辑 /System/Library/LaunchDaemons/ssh.plist

          <key>Listeners</key>
          <dict>
                  <key>SockServiceName</key>
                  <string>ssh-alt</string>
          </dict>

然后在/etc/services里定义：

   ssh-alt 12345/tcp # ssh-alt

然后重启sshd服务：

  sudo launchctl uload /System/Library/LaunchDaemons/ssh.plist 
  sudo launchctl load -w /System/Library/LaunchDaemons/ssh.plist

蛋碎！