Command-line tutorial for musicians using SendMIDI and ReceiveMIDI (description has important note)

IMPORTANT: Apple changed the default shell from bash to zsh. This video refers to the file .profile that needs to be edited. Instead of .profile, use .zprofile which is what zsh uses. This is a brain-dump tutorial of how to use the command-line on macOS, specifically for using my tools SendMIDI and ReceiveMIDI.