Since you're already using brew, I am running emacs-plus@27 on Big Sur on an MacBook Air M1 and it works perfectly. brew tap d12frosted/emacs-plus brew ins

Since you're already using brew, I am running emacs-plus@27 on Big Sur on an MacBook Air M1 and it works perfectly. brew tap d12frosted/emacs-plus brew install emacs-plus@27 Edit: code