Xcode 完全卸载->重新安装

1.根目录下的必须要用管理员权限:
sudo rm -rf /Applications/Xcode.app
sudo rm -rf /Library/Preferences/com.apple.dt.Xcode.plist

2.然后删除自己目录下的:
rm -rf ~/Library/Preferences/com.apple.dt.Xcode.plist
rm -rf ~/Library/Caches/com.apple.dt.Xcode
rm -rf ~/Library/Application\ Support/Xcode(即Application Support)

3.以及和开发者相关的:
默认Xcode是安装在磁盘的根目录上,目录名:Developer
rm -rf ~/Library/Developer/Xcode
rm -rf ~/Library/Developer/CoreSimulator
rm -rf ~/Library/Developer/XCPGDevices
rm -rf ~/Library/Developer(也可以只用这条命令,即Developer全部删除)

4.xcode缓存目录
rm -rf ~/Library/Developer/Xcode/DerivedData

5.Xcode余下的一些旧标记 Development Tools
sudo /Developer/Library/uninstall-devtools –mode=all

  1. 移除Command Line Tools
    sudo rm -rf /Library/Developer/CommandLineTools

查看版本:llvm-gcc --version
安装:xcode-select --install
安装和Xcode兼容的版本:sudo xcode-select --switch path/to/Xcode.app

6.下载新的Xcode
https://developer.apple.com/download/more/
安装Xcode会自动安装Command Line Toolds

参考:
How to Uninstall Xcode on macOS

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