Homebrew fails on MacOS Big Sur

Question

I upgraded from Mohave to Big Sur and found that homebrew is not working any more. I installed the command line tools using the command

xcode-select --install


        

Answer 1

If you run brew upgrade still meet the error, maybe you should run brew update first.

My experience is:

1. brew update
2. brew doctor
3. brew upgrade

Answer 2

When I follow @andrmu instructions, I received an error stating Homebrew: Your CLT does not support macOS 11.0.. I had to first follow the instructions to clean upgrade my command line tools as per the top answer on this issue, then it worked..

Answer 3

You should update brew;

brew update-reset

Answer 4

After brew upgrade this did the trick to avoid tmp/mysql.sock error. Use commandline command:

sudo chmod -R 0777 /usr/local/var/mysql/

Answer 5

You should update brew;

brew update-reset

Answer 6

I had the same problem. Try upgrading brew - this solved it for me.

brew upgrade