如果你使用的是Xcode测试版，运行

sudo xcode-select --switch /Applications/Xcode-beta.app/Contents/Developer 

而不是

sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer

我在尝试使用npm安装包时遇到了一个问题。 我得到了错误:“sudo xcode-select -s /Applications//Xcode.app/Contents/Developer/”

要解决这个问题

我打开Xcode。 首选项 位置 选择命令林工具:Xcode 6.1.1

现在当用npm安装包时，我不再会得到错误。

XCode2: sudo Xcode -select -s /应用程序/Xcode\ 2.app/内容/开发者

注意“\”以避开空格

如果你已经安装了XCode，你所要做的就是…

打开XCode 去Xcode >首选项>位置 从命令行工具选择你的XCode

简单的重新安装xcode-select

sudo rm -rf /Library/Developer/CommandLineTools
xcode-select --install

sudo xcode-select -s /Applications/Xcode 10.app/Contents/Developer

languoguangs-iMac:/ languoguang$ sudo xcode-select -s /Applications/Xcode 10.app/Contents/Developer
xcode-select: error: invalid argument '10.app/Contents/Developer'
Usage: xcode-select [options]

Print or change the path to the active developer directory. This directory
controls which tools are used for the Xcode command line tools (for example, 
xcodebuild) as well as the BSD development commands (such as cc and make).

Options:
  -h, --help                  print this help message and exit
  -p, --print-path            print the path of the active developer directory
  -s <path>, --switch <path>  set the path for the active developer directory
  --install                   open a dialog for installation of the command line developer tools
  -v, --version               print the xcode-select version
  -r, --reset                 reset to the default command line tools path
languoguangs-iMac:/ languoguang$ sudo xcode-select -s "/Applications/Xcode 10.app/Contents/Developer"

因为我在应用程序中的Xcode名称是Xcode 10，

sudo xcode-select -s "/Applications/Xcode 10.app/Contents/Developer"

的工作原理。