手动安装Command LineTool对我来说很有效。

我在App Store中暂停了xcode 仍然无法下载Homebrew 我通过链接手动安装命令行工具。 砰砰砰

https://developer.apple.com/download/more/?=command%20line%20tools

就我而言，

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

因为我的Xcode有一些特殊的名字。如)Xcode_11.2.0_beta_2_stackoverflow.app

cd /applications
ls

然后我找到了我的Xcode名称，然后用

sudo xcode-select -s /Applications/{myXcodeName}.app/Contents/Developer 

这对我很管用。

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

注意“\”以避开空格

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。

只需要两个步骤，和完整的XCode。App根本不需要:

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

此时弹出“Installing software”对话框:

就是这样!

我安装了两个Xcode实例。App和xcode-beta.app 当我试图用netbeans创建一个构建时，它向我显示了错误 支持的xcode版本和命令行工具没有找到netbeans

我遵循了以下步骤:

"xcode-select——print-path" = "/Applications/Xcode.app/Contents/Developer" " / / xcode /内容/应用开发人员/平台/ iPhoneSimulator。平台”的存在 "xcodebuild -version"以"Xcode"开头

after 1我发现它指向我到xcode-beta.app

下面是一个神奇的解决方案:

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