brew install Error: /usr/local/Cellar is not writable (Homebrew, macOS)

If you get the following error when trying to install or upgrade packages on your Mac by using Homebrew:

Error: /usr/local/Cellar is not writable. You should change the
ownership and permissions of /usr/local/Cellar back to your
user account: sudo chown -R $(whoami) /usr/local/Cellar

One of the following commands should solve it:

This one might work on older operating systems:

sudo chown -R $(whoami) /usr/local

However, on newer operating systems, you can’t change permissions for the directory /usr/local itself — but you can change the permissions for folders inside it by adding a forward slash and an asterisk:

sudo chown -R $(whoami) /usr/local/*

If the above doesn’t work, try running this command instead:

sudo chown -R $(whoami) $(brew --prefix)/*

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[GuglielmoRiva]

your an absolute hero man, thanks so much. Simple video so much better than all the stuff on stackoerflow

[refugeenius]

It worked for me (using it on a zsh shell / MacOS Ventura) Thank you!

[chandreshdadhaniya]

after follow every steps i save my valuable time

[prayaspanchuri]

thanks man your solution still worked.

[dirtman]

thaanksss, it works perfectly, I was trying to install mongodb and now with your solution I could

[MEDA]

SO easy and it worked exactly as you said it would thank you thank you

[paul]

I got a "bad file descriptor" error trying to brew upgrade after updating to macos 11.4 on a silicon macbook pro and this fixed it. I wonder why the permissions were wrong. everything in /usr/local/Cellar was root and now it works because it was changed to my user

[adityareddy]

Thanks a ton for taking time and making this video, truly appreciate your effort!
It doesn't work for me @techstacker. your commands work, I tried installing npm with homebrew and seems like I ended up with an error::
Error: An unexpected error occurred during the `brew link` step
The formula built, but is not symlinked into /usr/local
Permission denied @ dir_s_mkdir - /usr/local/share

Posting it here as this might help other members that were facing similar issue.