#install it
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/9d2ab46c92cc88470b1c54f5da2d0a1595188533/Formula/tmux.rb
#pin it just in case brew updated it
brew pin tmux #or you can brew pin --list / brew unpin tmux
#install it
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/9d2ab46c92cc88470b1c54f5da2d0a1595188533/Formula/tmux.rb
#pin it just in case brew updated it
brew pin tmux #or you can brew pin --list / brew unpin tmux