Homebrew install permissions issue

Question

I have a standard homebrew install inside of usr/local/

When I try:

Larson-2:~ larson$ brew install postgresql
Error: Cannot write to /usr/local/Cell         


        

Answer 1

This also happens if you have multiple users on your machine. If so, it would be best for you to change the user since every other approach would have you messing around with a lot more files and folders than just /usr/local/Cellar

Use su userWhoInstalledBrew.