To clear the terminal manually:


Command+K for newer keyboards

To clear the terminal from within a shell script;

/usr/bin/osascript -e ‘tell application “System Events” to tell process “Terminal” to keystroke “k” using command down’

A better way to clear the screen from within a script…

If you’re using the OS X Terminal app (as stated by the OP), a better approach (thanks to Chris Page’s answer to How do I reset the scrollback in the terminal via a shell command?) is just this:

clear && printf ‘\e[3J’ or more concisely (hat tip to user qiuyi):

printf ‘\33c\e[3J’

To delete the last output only:

⌘ + L

To clear the terminal completely:

⌘ + K