Useful Commands for Mac OS (X).
Start another instance of an app, even if one is already running
open -n -a APPLICATION-NAME
-n, --new Open a new instance of the application even if one is already running. -a, -- Opens with the specified application.
open -n -a /Applications/Ableton\ Live\ 10\ Lite.app
networksetup -listallhardwareports
sudo rm -rf /Library/Developer/CommandLineTools
sudo xcode-select --install
or
Alternatively, manually download them from: https://developer.apple.com/download/more/