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Your Homebrew-installed git is probably broken This seems to have come up a bunch of times but I have no idea how it happens 

brew MBP M1 fails to 'brew update' and 'brew upgrade'

You will only need to execute this once and you'll be okay afterwards Hi today i run brew update with no luck :(


This is my brew doctor


This is my brew config

brew Brew update error

@MikeMcQuaid Yes we absolutely need to fix this In the meantime the issue can be worked around by removing the cached download: 

brew brew cleanup fails when cask is defined in multiple taps

@bm5k figured it out for 10.12 which uses ssh-agent now (cool) Just
ssh-add ~/.ssh/<your rsa file>
And then you can brew update 

brew Brew update fails with Permission denied (publickey).

Possibly related: I reproduced the same on High Sierra and after performing the HOMEBREW_NO_ENV_FILTERING=1 hack 

brew brew update failed with "Error: Git must be installed and in your PATH!"

As a temporary workaround brew config output


brew doctor output




 The brew doctor above contains no Warning lines 

brew SSL error when downloading from homebrew.bintray.com

I had the same issue my problem was that I run a sudo command that probably affected some permissions 

brew brew update : Bad file descriptor (Errno::EBADF)

In addition to installing XCode 12.2 I had to

to get brew upgrade/brew install to work on Big Sur 

brew Homebrew does not work on Big Sur (10.16/11.0)

OK Please try this: I have both 8.3.3 and 9.0 installed on MacOS High Sierra When running brew upgrade xxxx 

brew Homebrew doesn't allow side-by-side Xcode 8.3.3 and 9.0 installations

I met this issue too when I had ran brew upgrade，so I tried:

brew uninstall --ignore-dependencies perl
brew uninstall vim
brew install vim

Event though I have to update my Vim version

brew Broken vim after perl upgrade

Looks like there's a significant issue with the way SwiftPM handles pkg-config Please note we will close your issue without comment if you delete 

brew pkg-config files on >=10.14 assume headers in /usr/include

@DomT4 FYI Travis sets CI as well so you could just use that instead of both TRAVIS and CIRCLECI. 