Select "Utilities" and "Terminal" to launch the command console and attempt to format troublesome hard drives that can't be formatted within Mac OS X.

These 20 essential Mac terminal commands allow you to easily navigate the system, manage files, perform system tasks and more.

Terminal brings the command line back to your Mac. Here's how to use it to customise and troubleshoot your Mac, and the most commonly used Terminal commands ...

The OS X Terminal opens up a world of powerful UNIX utilities and scripts. If you're migrating from Linux, you'll find many familiar commands work t ...