There are some times when it can be useful to have multiple copies of the same app open simultaneously—not just a separate window but full versions of the app running alongside each other. Maybe ...

These are the basic macOS Terminal commands to know for updating a Mac, forcing an unresponsive Mac to shut down, finding the differences between files easily and much more.

To learn more Terminal commands, see our articles on how to copy and move folders as well as delete files and folders using the command line and get help when you need it from man pages.