Topher, an avid Mac user for the past 15 years, has been a contributing author to MacFixIt since the spring of 2008. One of his passions is troubleshooting Mac problems and making the best use of Macs ...

A terminal is an application on Unix-based operating systems that provides a command-line interface (or CLI), so you can interact with the operating system’s shell and access/control its different ...

An operating system that is directed by entering text commands. DOS is an example of a widely used command line operating system. See DOS and command line. THIS DEFINITION IS FOR PERSONAL USE ONLY.

In the event of a serious problem with your Mac, you may need to reinstall your Mac operating system. There’s a simple way to do this using your Mac Recovery partition or via Mac Internet Recovery.