Open Files from Command Line on OS X

By  on  

I'm as much of a fan of application UIs as anyone else but I'm finding myself working more and more from the command line lately.  Much of that is becoming obsessed with media manipulation but I'm forcing myself to use less UIs so that I can understand what's under the hood of my favorite utilities.

One common case for running any app is opening an existing file, like an HTML file in a browser or a document in Pages.  To open a file on Mac OS X from the command line, type the following:

open portrait.png

The above does not specify an app to open the given file in -- the default app for that file type will be used.  To open a file in a specific app, use the -a argument:

open -a /Applications/Firefox.app portrait.png

You can also open a URL directly from the command line:

open https://davidwalsh.name/

You'd expect opening a file from command line to be easy and I'm happy to confirm to you that it is.

Recent Features

  • By
    fetch API

    One of the worst kept secrets about AJAX on the web is that the underlying API for it, XMLHttpRequest, wasn't really made for what we've been using it for.  We've done well to create elegant APIs around XHR but we know we can do better.  Our effort to...

  • By
    Write Simple, Elegant and Maintainable Media Queries with Sass

    I spent a few months experimenting with different approaches for writing simple, elegant and maintainable media queries with Sass. Each solution had something that I really liked, but I couldn't find one that covered everything I needed to do, so I ventured into creating my...

Incredible Demos

  • By
    CSS content and attr

    CSS is becoming more and more powerful but in the sense that it allows us to do the little things easily.  There have been larger features added like transitions, animations, and transforms, but one feature that goes under the radar is generated content.  You saw a...

  • By
    Implementing Basic and Fancy Show/Hide in MooTools 1.2

    One of the great parts of MooTools is that the library itself allows for maximum flexibility within its provided classes. You can see evidence of this in the "Class" class' implement method. Using the implement method, you can add your own methods to...

Discussion

  1. I was just wondering how to do this, thanks!

  2. Eric

    When you use -a, you don’t need to write the path.

    open -a Firefox portrait.png

    …would do the same. :)

    The -a handler is great when you want to open some program one doesn’t really know (eg remember) exactly where it is.

    Like:

    open -a "Wi-Fi Diagnostics"

    // that one is in /System/Library/CoreServices

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!