每当我尝试运行brew update时，我都会收到此警告。我不确定如何修复它，因为它与aws-cli有关。
Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
pycparser
我试图在卸载aws-cli后重新安装brew包。
我能够解决这个问题，这是一个问题与自制我使用brew untap homebrew/core和问题得到修复
在我的机器上，brew doctor发出了以下警告:
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!
Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
pycparser
cffi
Warning: You have an unnecessary local Cask tap.
This can cause problems installing up-to-date casks.
Please remove it by running:
brew untap homebrew/cask
Warning: You have an unnecessary local Core tap!
This can cause problems installing up-to-date formulae.
Please remove it by running:
brew untap homebrew/core
同时运行
brew untap homebrew/cask
和
brew untap homebrew/core
已解决问题:
brew update && brew upgrade && brew autoremove && brew doctor
Already up-to-date.
Your system is ready to brew.