Using brew in a multi-user system

Homebrew is single-owner: everything under its prefix belongs to whoever installed it. A second user running brew install hits permission errors or ends up with a second prefix. Fix: other users run brew as the owner.

# ~/.zshrc of each non-owner user (owner's prefix must be on PATH first)
unalias brew 2>/dev/null
brewser=$(stat -f "%Su" "$(which brew)")
alias brew='sudo -Hu '$brewser' brew'

stat -f "%Su" prints the owner of the brew binary; sudo -H sets HOME to that user’s so caches and config land in the right place. The non-owner needs sudo (Admin group).

Adapted from cerico, dev.to.