If you want to take a look at your boot drive in another computer or without the use of a live CD, you’ll need a caddy to whack it in.

如果你想看看引导盘在其他电脑（或者不想用LiveCD）的情况，你就需要一个硬盘架子来装置。

I then rebooted and rerun the Xcode installer (in the Applications folder) which then offered to update the development tools on my boot drive.

接着我重启系统并重新运行Xcode安装程序（在Applications目录中），然后安装程序自动地更新了引导驱动器上的开发工具。