对我来说最简单的解决方法就是拖放Xcode。应用程序从当前位置(在我的情况下，它在下载)到应用程序。

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。

我在高海拔地区也遇到了同样的问题。 运行下面的命令可以解决这个问题

npm explore npm -g -- npm install node-gyp@latest

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

注意“\”以避开空格

对我来说最简单的解决方法就是拖放Xcode。应用程序从当前位置(在我的情况下，它在下载)到应用程序。

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