Unable to install: "fatal: the remote end hung up unexpectedly"

[tagmanPM]

I'm a newbie to Homebrew, failing to install for the very first time on a new MacBook that meets macOS Requirements:
-- 64-bit Intel CPU
-- macOS Big Sur 11.1
-- Xcode Command Line Tools (CLT) installed
-- shell for installation (zsh)

I followed instructions at https://docs.brew.sh/Installation yet the install fails with error
"Error: Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core failed!"

Can anyone help me, please?
Thanks.

Terminal screen output:

% /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
Password:
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew

Press RETURN to continue or any other key to abort
==> /usr/bin/sudo /usr/sbin/chown -R username:admin /usr/local/Homebrew
==> Downloading and installing Homebrew...
remote: Enumerating objects: 2, done.
remote: Counting objects: 100% (2/2), done.
remote: Total 7 (delta 2), reused 2 (delta 2), pack-reused 5
Unpacking objects: 100% (7/7), done.
From https://github.com/Homebrew/brew
   4ae8dfe43..8de10a05b  master     -> origin/master
HEAD is now at 8de10a05b Merge pull request #10472 from MikeMcQuaid/new-issue-templates
error: Not a valid ref: refs/remotes/origin/master
fatal: ambiguous argument 'refs/remotes/origin/master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
fatal: the remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed
Error: Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core failed!
fatal: invalid upstream 'origin/master'
Failed during: /usr/local/bin/brew update --force --quiet

[SMillerDev]

Are you using Little Snitch?

[HannibalHind]

Yes but my unknown "server admin" hid it because I caught enterprise action. How do I solve this? Excuse terminology I'm new EPT. Please help with something I can paste

[XxSonicGhostxX]

see this is were I'm lost, so how do we find said “server admin”?
why is there one to start with? I have so many questions..right now it installed srgn.
also trying to update ruby etc..hope you get your issues fixed bud. also apologize for term but new.

[sounava24]

lol just switch to mobile hotspot and boom it works.

[Rylan12]

Do you already have a /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core directory? If so, can you paste the contents of the file /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/.git/config? I don't have a specific solution in mind I'm just curious if that will help diagnose.

[tagmanPM]

I tried brew update-resetas you suggested. It completed c.40% of the download then failed:

% brew update-reset
==> Fetching /usr/local/Homebrew...

==> Resetting /usr/local/Homebrew...
Branch 'master' set up to track remote branch 'master' from 'origin'.
Switched to and reset branch 'master'
Your branch is up to date with 'origin/master'.

==> Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core...
remote: Enumerating objects: 56, done.
remote: Counting objects: 100% (56/56), done.
remote: Compressing objects: 100% (40/40), done.
fatal: the remote end hung up unexpectedly 0.57 MiB | 3.07 MiB/s
fatal: early EOF
fatal: index-pack failed
error: Not a valid ref: refs/remotes/origin/master

==> Resetting /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core...
fatal: ref refs/remotes/origin/HEAD is not a symbolic ref
fatal: 'origin/HEAD' is not a commit and a branch '' cannot be created from it

[tagmanPM]

homebrew-core % git clone https://github.com/Homebrew/homebrew-core.git .
fatal: destination path '.' already exists and is not an empty directory.

[tagmanPM]

I also tried both git config --global http.postBuffer 524288000 and git config --global http.postBuffer 1048576000 per the post that you referenced - no joy, only the same error reported:

fatal: the remote end hung up unexpectedly 0.57 MiB | 3.07 MiB/s
fatal: early EOF
fatal: index-pack failed
error: Not a valid ref: refs/remotes/origin/master

[tagmanPM]

I also tried another method referenced in that same stackoverflow doc:

% git config --global http.postBuffer 500M
% git config --global http.maxRequestBuffer 100M
% git config --global core.compression 0

No joy again - same error:

% brew update-reset                             
==> Fetching /usr/local/Homebrew...
remote: Enumerating objects: 357, done.
remote: Counting objects: 100% (357/357), done.
remote: Compressing objects: 100% (65/65), done.
remote: Total 499 (delta 313), reused 314 (delta 288), pack-reused 142
Receiving objects: 100% (499/499), 217.97 KiB | 672.00 KiB/s, done.
Resolving deltas: 100% (333/333), completed with 186 local objects.
From https://github.com/Homebrew/brew
   8de10a05b..3b8fa5a7a  master     -> origin/master

==> Resetting /usr/local/Homebrew...
Branch 'master' set up to track remote branch 'master' from 'origin'.
Reset branch 'master'
Your branch is up to date with 'origin/master'.

==> Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core...
remote: Enumerating objects: 166, done.
remote: Counting objects: 100% (166/166), done.
remote: Compressing objects: 100% (77/77), done.
fatal: the remote end hung up unexpectedly0.17 MiB | 4.26 MiB/s 
fatal: early EOF
fatal: index-pack failed
error: Not a valid ref: refs/remotes/origin/master

==> Resetting /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core...
fatal: ref refs/remotes/origin/HEAD is not a symbolic ref
fatal: 'origin/HEAD' is not a commit and a branch '' cannot be created from it

What is the significance of error: Not a valid ref: refs/remotes/origin/master?

[mosspassion]

How about the output of brew update --force --verbose? Not sure that will give any more helpful information but it's worth a try I think.

Some other things you could try: run brew update-reset

Manually clone the homebrew/core repo by running the following:

cd $(brew --repo homebrew/core)
git clone https://github.com/Homebrew/homebrew-core.git .

My guess is that those won't work either, though. You could try increasing the http.postBuffer setting in your git config per this link (thanks Shaun for suggesting that)

I was having an issue with brew installation where the core would fail to install (tried installing multiple times with the standard installation curl). I ran brew --version and saw (no git repository) at the core folder.

Running brew update-reset fixed my installation issue. Thanks!

[Melodium27]

Bonjour je n'arrive pas non plus à l'installer !

Lorsque je fais entrer .rien ne fonctionne ...

`Last login: Mon Feb 1 22:33:58 on ttys011
iMac-de-Pauchard:~ Melodium$ /usr/local/microsoft/powershell/6/pwsh ; exit;
PowerShell 6.1.1
Copyright (c) Microsoft Corporation. All rights reserved.

https://aka.ms/pscore6-docs
Type 'help' to get help.

PS /Users/Melodium> /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
PS /Users/Melodium>
PS /Users/Melodium>
PS /Users/Melodium>

[Rylan12]

We've discussed this issue internally a little bit. There doesn't seem to be anything that we can do on our end. There have been no changes to the code involved here recently, and it's not an issue that's reproducible by the maintainers.

It seems there are two options for what could be happening:

1. It's an issue with your internet connection
2. It's an issue with GitHub

If it's the first, that's something you'll need to figure out. You can probably test this by attempting to install Homebrew while on a different network.

If that doesn't seem to work, it's likely an issue on GitHub's end. There isn't much we can do to help here. The best thing you can do is open a support ticket with them. If more people are experiencing this issue, they should also open tickets. That's the best way to draw their attention to the issue. They will hopefully be able to help more than we can.

[yccheok]

Same problem in fresh new macOS Catalina 10.15.7

[SarpongAbasimi]

I am also having the same issue on a brand new mac.
This is the full error log that I am getting.

➜  ~ brew install ammonite-repl
==> Tapping homebrew/cask
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask'...
remote: Enumerating objects: 566225, done.
remote: Counting objects: 100% (486/486), done.
remote: Compressing objects: 100% (259/259), done.
fatal: the remote end hung up unexpectedly67.32 MiB | 6.16 MiB/s
fatal: early EOF
fatal: index-pack failed
Error: Failure while executing; `git clone https://github.com/Homebrew/homebrew-cask /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask 

Maybe this is exclusively a mac problem.

[LouieMartin]

I have this issue on WSL2 on Ubuntu version: 22.04

[osalbahr]

@LouieMartin does the issue persist even if you try it a few times?

[tagmanPM]

Thanks for your help Rylan, understood. I am certain that it's not my internet connection, as it's 200Mb broadband over fibre network. Never had a problem downloading anything else before now. Will try GitHub.
P

[WayneLambert]

I had the same issue with cloning homebrew-core over https (Big Sur 11.0.1, Little Snitch - although Little Snitch network filter was disabled) ~ 30 secondish remote disconnects. Cloning over ssh works and forcing GitHub URLs over SSH fixed the issue (from Homebrew/legacy-homebrew#34363 (comment)), add the following to ~/.gitconfig:

[url "git@github.com:"]
    insteadOf = "https://github.com/"

Thanks @euoia . This one seemed to work for me. I tried dozens of different values for postBuffer and compression within my gitconfig and this one seemed to do the trick.

For others, I was attempting to install Homebrew on a Mac Mini M1 running Mac OS Big Sur 11.5.1 using the following command:

$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

It used to run and always fail with the error message that this issue pertains, but following adding the suggested config to the global .gitconfig file, Homebrew was successfully installed. Finally! 😄

$ brew --version
Homebrew 3.2.9
Homebrew/homebrew-core (git revision 0c0565210a; last commit 2021-08-24)

[tchaton]

Somehow this doesn't work for me either.

Please make sure you have the correct access rights
and the repository exists.
ssh: connect to host github.com port 22: Operation timed out
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

[PythonCoderAS]

@tchaton did you add your ssh key to github?

[donniedarko-zen]

It's been confirmed that this is a bug in BigSur and Apple is fixing in BigSur 11.3 by the looks of it. Any product like antivirus etc which taps network traffic will be affected and cause this issue.

many thanks. I tried many ways, nothing worked for me. I have m1 mac, and I was using 11 version. I have just updated the mac to 12 version, and now I have installed the brew without any problem.

[JamesHandshoe]

In my .gitconfig I had ssh in front of the git@github.com - now it is working for me after changing to the reference mentioned above. Hopefully this helps someone else

[MATT-OG89]

I have the exact same issue, anyone have an update regarding this?

[carlocab]

There was an update here: #666 (reply in thread)

See also the comments just before that.

[maciej-w]

I faced this issues and it turned out my ISP (Virgin UK) provider. Using a VPN fixed it.

[nardove]

Worked! how would I know that my IP Child Safe was the issue all along, I did try MANY routes to solve this before to no avail, thank you.

[amardeepchawla]

Thanks! Worked!

[oluwatomison]

Thanks, It is working now

[PhilA1]

Same here, thanks virgin media

[wiaam-kareem]

thanks its worked for me

[MATT-OG89]

OK, I'm not 100% if this applies to all people on this discussion. My issue turned out to be DNS related, I set my network config to Google's public 8.8.8.8 DNS. I can now install Homebrew via terminal with no issues. Was very simple in the end, hope this helps someone.

[p-linnane]

What 'script' are you referring to? You can see from the many other replies in this thread these problems are network issues, and not Homebrew issues.

[p-linnane]

Yeah, there's no issue with the install script. If you're experiencing this error, it's an issue with your connection.

[simonhunt]

I've just been wresting with this same problem and noticed that somebody else mentioned also being a Virgin Media Customer. I found that turning off the Web Safe features meant that I could install without any problem. I've sent Virgin a message explaining this. I also had to follow the advice about removing the Brew folders from /usr/local as the aborted install attempts had already created these.

[walker-tom]

I'm with Virgin Media UK and had the same problem today. Disabling Virgin's Web Safe features worked for me as well. In particular it was the Child Safe setting that needed disabling rather than Virus Safe. For reference I'm running macOS Catalina 10.15.7 and had already tried increasing the postBuffer size as was previously mentioned.

[charlietlamb]

Thanks a lot, the child safe was the problem for me aswell.

[AlistairHaimes]

Me too - thanks to whoever worked this out

[qiushile]

Thank you for the solution. It works for my mac.

[Wwrrdnmld]

https://github.com/orgs/Homebrew/discussions/666#discussioncomment-1406045

[stoufa]

You won't believe how I solved this issue! ... I simply switched from zsh to bash and it magically worked! 😅

[llimllib]

this worked for me too, that is bizarre. I am going to try not to spend my life debugging why this happened

(thank you)

[KarimElshaweish]

Saved my day

[dicaelusdialatus]

how do you do this? Sorry, quite new to this world

[osalbahr]

how do you do this? Sorry, quite new to this world

@dicaelusdialatus You could temporarily do so by typing bash in the terminal.

Note that macOS ships with an outdated bash.

[fengjch127]

Yes this also fixed the issue for me but the question became why zsh is acting strange, even zsh --norcs does not work

[Oluwaseunus]

Just in case anyone else is facing this issue and this doesn't work for you:

rm -fr $(brew --repo homebrew/core)  # because you can't `brew untap homebrew/core`
brew tap homebrew/core

Using the installation link but with an uninstall command worked for me. Like so:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"

[durikr]

@crunchyericford

The uninstall command, and then removing the directories that command says "you might want to remove" and then running the install again fixed me up.

This worked for me too Thanks!

[Johnny1776]

A summary of all the tricks I added to get this to work:

1. Make sure you're on the latest version of Mac OS
2. Try removing your ISP Child and Web Safe 设置
3. Change DNS 设置 to something like Google
4. Ensure you are using the Bash Shell
5. Try this if you have an unresolved partial install of brew: rm -fr $(brew --repo homebrew/core) & brew tap homebrew/core
6. Make sure it's all properly uninstalled before trying again: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"

This has wasted 3 hours of my day.... All so I can use a little app to burn a ISO. FFS!

[nedwors]

I know there's a lot of comments above for all of this but thank you for this summary 💪

[saadounGit]

THANK YOU!!!

[yccheok]

I have a very similar error

1. Good Internet connection
2. Try VPN
3. Use Google DNS
4. Restart few times
5. No anti-virus

But... it still doesn't work for me :-( I am getting similar error, and I have no more idea how to proceed

I also check the git. Seem legit

yccheok@Yans-MacBook-Pro ~ % git --version
git version 2.24.3 (Apple Git-128)

Have setup email for git

yccheok@Yans-MacBook-Pro ~ % git config --global user.email xxx@gmail.com

Have read

1. Unable to install: "fatal: the remote end hung up unexpectedly" #666
2. https://stackoverflow.com/questions/39836190/homebrew-install-failed-during-git-fetch-origin-masterrefs-remotes-origin-mas
3. Homebrew cannot be installed with the provided install script in the homepage brew#10878

But still getting the below error no matter how many times I have tried

yccheok@Yans-MacBook-Pro ~ % git config --global user.email xxx@gmail.com
yccheok@Yans-MacBook-Pro ~ % /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
==> Checking for `sudo` access (which may request your password).
Password:
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew

Press RETURN to continue or any other key to abort
==> /usr/bin/sudo /usr/sbin/chown -R yccheok:admin /usr/local/Homebrew
==> Downloading and installing Homebrew...
remote: Enumerating objects: 19, done.
remote: Counting objects: 100% (19/19), done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 28 (delta 12), reused 12 (delta 12), pack-reused 9
Unpacking objects: 100% (28/28), done.
From https://github.com/Homebrew/brew
   1777a03aac..731e25e0cc  master     -> origin/master
HEAD is now at 731e25e0cc Merge pull request #11041 from xxyzz/man
error: Not a valid ref: refs/remotes/origin/master
fatal: ambiguous argument 'refs/remotes/origin/master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
fatal: SHA1 COLLISION FOUND WITH e9405b4a427b316ef3e5f01422bcf58e74982ad0 !
fatal: index-pack failed
Error: Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core failed!
fatal: invalid upstream 'origin/master'
Failed during: /usr/local/bin/brew update --force --quiet

Any idea?

[anudeep586]

it worked

[Grace-1024]

It works on my m1 macbook pro!

[one1color]

It worked for me, great!

[rayjun]

it works(m1 mac), thanks

[saboo4800]

Thank you so much!!

[eozffgu]

I'm a newbie to Homebrew, failing to install for the very first time on a new MacBook that meets macOS Requirements:

-- 64-bit Intel CPU

-- macOS Big Sur 11.1

-- Xcode Command Line Tools (CLT) installed

-- shell for installation (zsh)

I followed instructions at https://docs.brew.sh/Installation yet the install fails with error

"Error: Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core failed!"

Can anyone help me, please?

Thanks.

Terminal screen output:

% /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Password:

==> This script will install:

/usr/local/bin/brew

/usr/local/share/doc/homebrew

/usr/local/share/man/man1/brew.1

/usr/local/share/zsh/site-functions/_brew

/usr/local/etc/bash_completion.d/brew

/usr/local/Homebrew



Press RETURN to continue or any other key to abort

==> /usr/bin/sudo /usr/sbin/chown -R username:admin /usr/local/Homebrew

==> Downloading and installing Homebrew...

remote: Enumerating objects: 2, done.

remote: Counting objects: 100% (2/2), done.

remote: Total 7 (delta 2), reused 2 (delta 2), pack-reused 5

Unpacking objects: 100% (7/7), done.

From https://github.com/Homebrew/brew

   4ae8dfe43..8de10a05b  master     -> origin/master

HEAD is now at 8de10a05b Merge pull request #10472 from MikeMcQuaid/new-issue-templates

error: Not a valid ref: refs/remotes/origin/master

fatal: ambiguous argument 'refs/remotes/origin/master': unknown revision or path not in the working tree.

Use '--' to separate paths from revisions, like this:

'git <command> [<revision>...] -- [<file>...]'

fatal: the remote end hung up unexpectedly

fatal: early EOF

fatal: index-pack failed

Error: Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core failed!

fatal: invalid upstream 'origin/master'

Failed during: /usr/local/bin/brew update --force --quiet

[carlocab]

Can you try the following?

cd /tmp
git clone https://github.com/Homebrew/homebrew-core.git

[crazy4groovy]

I tried this, the clone worked okie dokie.

I wonder, why does this script command:

execute "git" "fetch" "--force" "origin" "refs/heads/master:refs/remotes/origin/master"

cause this install error?

==> Downloading and installing Homebrew...
HEAD is now at 40852d73d Merge pull request #14195 from Homebrew/sorbet-files-update
error: Not a valid ref: refs/remotes/origin/master
fatal: ambiguous argument 'refs/remotes/origin/master': unknown revision or path not in the working tree.
...

[katzmeowski]

I think I've figured it out! It appears to be a problem with Macs doing large downloads over 5GHz wifi bands. My home router is running 5GHz and would not work, but when I switched to my mobile hotspot which runs 2.4GHz the Homebrew installation was fast and painless.

For reference, I'm using a MacBook Air with Apple M1 chip. I would be curious to see if others who have this issue are using the same hardware, and if this is unique to M1 or if it affects Intel Macs as well. Either way, looks like this will be an issue for all developers until Apple pushes a fix out.

[tchaton]

OMG ! Worked !

[prelipceang]

your solution actually worked - thank you!

[goose-life]

thank you!

[qijianpeng]

thank you!

[goodKathy]

Finally works, thank you!

[0xC83736]

had the same issue as OP and just did sudo rm -rf /usr/local/Homebrew and pasted the install line from the homepage and solved it

[serendipity-cmyk]

To me, it was a pure internet connection issue. Did again when the connection was more stable, worked!

[mpnoodles]

kinda of same problem how to solve the prob?

Tapping homebrew/cask
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask'...
remote: Enumerating objects: 616960, done.
fatal: write error: No space left on device5.26 MiB | 590.00 KiB/s
Error: Failure while executing; git clone https://github.com/Homebrew/homebrew-cask /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask --origin=origin --template= exited with 128.
error: Not a valid ref: refs/remotes/origin/master
fatal: ambiguous argument 'refs/remotes/origin/master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git [...] -- [...]'
fatal: write error: No space left on device
Error: Fetching /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core failed!
fatal: Needed a single revision
invalid upstream 'origin/master'
Failed during: /usr/local/bin/brew update --force --quiet

[gromgit]

fatal: write error: No space left on device

I'd guess you need to delete any files you no longer need. Don't forget to empty your Trash too.

[Musdon]

brew update-reset worked for me and then I switched my internet too.

[crazy4groovy]

I suggest running the install script inside a rosetta 2 terminal:

https://apple.stackexchange.com/questions/409746/run-everything-in-rosetta-2-on-silicon-mac

This worked for me, after nothing else did.

Not sure what any long-term consequences might be... 🤷

[rohansahai]

Getting this same issue on a brand new mac with no internet connection issues 😞

[rohansahai]

It eventually succeeded if I just waited!

[romanshutsman]

same issue on MBP 13, 2022, M2
thanks @zal-lex https://github.com/orgs/Homebrew/discussions/666#discussioncomment-940288
Just need to wait in my case it is nearly 5-7minutes, it depends on your speed of the internet (I was using mobile spot)

[benben2001]

yes, i waited six minutes and finally it finished.

[tagmanPM]

Closing this discussion now as I think it's run its course. It turned out that my real issue was the ISP (Virgin Media) ...

[ruchenguang]

For my case, I found I cannot ping github.com in terminal (not sure about the reason; I can access github on the web without any problem)
I found this page: https://forum.manjaro.org/t/http-2-stream-1-was-not-closed-cleanly-before-end-of-the-underlying-stream/96725/4, and used the host file.
And wait... It worked!

Hope this can be helpful for some.

[MusbahuTijjani]

Yt

[benben2001]

i tried so many methods but they are all not work . i executed the install command and just waited and finally it worked. so you can try wait for the command finished and dont control +c. Hope this information can help you .

[ghost]

Turning off the macOS firewall fixed this for me.

[cedev-lmat]

That fixes it for me as well.

[okineadev]

This is a problem with your internet connection, if it's slow you'll get this error, so try connecting to a faster network

[alejandrosanchezcabana]

I got this on my freshly installed Sequoia, it was easy to solve by following https://stackoverflow.com/questions/48987512/ssl-connect-ssl-error-syscall-in-connection-to-github-com443

In short, running networksetup -setv6off Wi-Fi

[ghost]

Hi @tagmanPM I ran into the same issue recently and managed to fix it. Here's what worked for me:

1. Remove any partial or broken Homebrew installs:
   sudo rm -rf /usr/local/Homebrew /usr/local/bin/brew

2. Set Git’s default branch to main (helps with the origin/master error):
   git config --global init.defaultBranch main

3. Reinstall Homebrew:
   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

4. If the error still appears, try manually cloning the Homebrew core tap:
   mkdir -p /usr/local/Homebrew/Library/Taps/homebrew cd /usr/local/Homebrew/Library/Taps/homebrew git clone https://github.com/Homebrew/homebrew-core

Then test it with:
brew doctor brew update