By default, it opens with the application that is assigned to work with its file type so, if you have Microsoft Office on your Mac, a.
The basic way to open a file on the Mac - and on Windows as well - is to double-click a file. Here are a dozen ways you can open files on a Mac. You can open files in windows, from menus, and from dialogs. But did you know that there are lots of different ways to open files? You can use your mouse, your trackpad, or even your keyboard. You open files every time you work on your Mac, most often, probably, by double-clicking them.
