Hi, I am trying to reinstall ffmpeg n terminal however keep getting a message saying. Error: python 3.9: the bottle needs the Apple Command Line Tools to be installed. You can install them, if desired, with: xcode-select --install So I enter xcode-select --install in terminal and a window opens telling me the xcode select command requires the command line developer tools and do I wish to install the. I click on Install and get agreement window which I agree and then two windows: "Continue on battery power" and :Finding Software" If I click 'Continue on battery power", immediately the progress bar jumps to about 1/6 progress and then never moves any further. With or without a mains lead connected? Any help to resolve this? I have seen advice on installing the command line tools direct from the Apple Developer Page, but cannot find a correct link. Many thanks.