MacOs Big Sur Your Command Line Tools (CLT) does not support macOS 11.

MacOs 升级到11大版本，首先使用homebrew出了问题。

首先碰到是brew用不了的问题，rb脚本里报了个版本不支持的错误，解决方案​ 

​ brew update-reset ​

 

然后安装一个别的工具libimobiledevice报错

brew install --HEAD libimobiledevice

Error: Your Command Line Tools (CLT) does not support macOS 11.
It is either outdated or was modified.
Please update your Command Line Tools (CLT) or delete it if no updates are available.
Update them from Software Update in System Preferences or run:
  softwareupdate --all --install --force

If that doesn't show you any updates, run:
  sudo rm -rf /Library/Developer/CommandLineTools
  sudo xcode-select --install

Alternatively, manually download them from:
  https://developer.apple.com/download/more/.
You should download the Command Line Tools for Xcode 12.5.

报错信息里给了3个方案，softwareupdate，不行，没有更新。删除CLT重新安装，成功了。