Open, command Mac terminal:

Most Mac users will know that the open command in the Terminal will open files in the GUI or open a directory in Finder for example open . will open Finder in the current directory, this is useful, but there are a few more things it can do including opening in a specified application.

Here is the usage dump from the tool:

Usage: open [-e] [-t] [-f] [-W] [-R] [-n] [-g] [-h] [-s <partial SDK name>][-b <bundle identifier>] [-a <application>] [-u URL] [filenames] [--args arguments]
Help: Open opens files from a shell.
      By default, opens each file using the default application for that file.
      If the file is in the form of a URL, the file will be opened as a URL.
      -a                    Opens with the specified application.
      -b                    Opens with the specified application bundle identifier.
      -e                    Opens with TextEdit.
      -t                    Opens with default text editor.
      -f                    Reads input from standard input and opens with TextEdit.
      -F  --fresh           Launches the app fresh, that is, without restoring windows. Saved persistent state is lost, excluding Untitled documents.
      -R, --reveal          Selects in the Finder instead of opening.
      -W, --wait-apps       Blocks until the used applications are closed (even if they were already running).
          --args            All remaining arguments are passed in argv to the application's main() function instead of opened.
      -n, --new             Open a new instance of the application even if one is already running.
      -j, --hide            Launches the app hidden.
      -g, --background      Does not bring the application to the foreground.
      -h, --header          Searches header file locations for headers matching the given filenames, and opens them.
      -s                    For -h, the SDK to use; if supplied, only SDKs whose names contain the argument value are searched.
                            Otherwise the highest versioned SDK in each platform is used.
      -u, --url URL         Open this URL, even if it matches exactly a filepath
      -i, --stdin  PATH     Launches the application with stdin connected to PATH; defaults to /dev/null
      -o, --stdout PATH     Launches the application with /dev/stdout connected to PATH;
          --stderr PATH     Launches the application with /dev/stderr connected to PATH to


View a MD file in Marked

open -a Marked\ 2

Opens the file in the Marked 2 application, note the escaped space.

Select a file in Finder

open -R <filename>

This will open the file called <filename> in the Mac Finder window and then select it.

Edit a text file in Textedit in the GUI

open -e <filename>

This one will open <filename>in the Textedit app, handy if you aren’t comfortable with Vim.