Macのターミナルでbrewコマンドを実行できなくなったときの対処法 - QiitaError: /usr/local is not writable. You should change the ownership and permissions of /usr/local back to your user account: sudo chown -R $(whoami) /usr/local Error: Your Xcode (1) is too outdated. Please update to Xcode 8.3.2 (or delete it). Xcode can be updated from https://developer.apple.com/download/more/ Error: Your Command Line Tools are too outdated. Update them from Software Update in the
