These instructions took me down a rabbit hole. Homebrew : `Error: Cannot install in Homebrew on ARM processor in Intel default prefix (/usr/local)!` – Stack Overflow
# ~/.zshrc
export PATH="/usr/local/bin:$PATH" # arm64e homebrew path (m1 )
export PATH="/opt/homebrew/bin:$PATH" # x86_64 homebrew path (intel)
alias mbrew="arch -arm64e /opt/homebrew/bin/brew" # arm64e homebrew path (m1 )
alias ibrew="arch -x86_64 /usr/local/bin/brew" # x86_64 homebrew path (intel)
