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1. Macos Bash Script
2. Script Center 1.0 For Macos Sierra
3. Script Center 1.0 For Macos 10.13
4. Macos Shell Script

Basically, a Mac application has a .app extension, but it’s not really a file — it’s a package. You can view the application’s contents by navigating to it in the Finder, right-clicking it and then choosing “Show Package Contents”.

The internal folder structure may vary between apps, but you can be sure that every Mac app will have a Contents folder with a MacOS subfolder in it. Inside the MacOS directory, there’s an extension-less file with the exact same name as the app itself. This file can be anything really, but in its simplest form it’s a shell script. As it turns out, this folder/file structure is all it takes to create a functional app!

If you want to use the script as-is, with no editing: 1. Create a 'Management' folder in /Library. Copy and paste the script into a plain text TextEdit document. Save the script as 'initswupdater.sh' in the /Library/Management folder. Do 'chmod a+x initswupdater.sh' in Terminal to make it executable. By default, macOS comes with Python 2.7.3 installed. That’s not the newest version of Python, however. If you’ve installed Python 3, you’ll have access to a few more software tools. These include the Python Launcher, a GUI program that runs Python scripts. If it is installed on your Mac, you can run Python scripts from Finder. PyAutoGUI lets Python control the mouse and keyboard, and other GUI automation tasks. For Windows, macOS, and Linux, on Python 3 and 2.

Enter appify

After this discovery, Thomas Aylott came up with a clever “appify” script that allows you to easily create Mac apps from shell scripts. The code looks like this:

Installing and using appify is pretty straightforward if you’re used to working with UNIX. (I’m not, so I had to figure this out.) Here’s how to install it:

Macos Bash Script

1. Save the script to a directory in your PATH and name it appify (no extension). I chose to put it in /usr/local/bin, which requires root privileges.
2. Fire up Terminal.app and enter sudo chmod +x /usr/local/bin/appify to make appify executable without root privileges.

After that, you can create apps based on any shell script simply by launching Terminal.app and entering something like this:

Obviously, this would create a stand-alone application named Your App Name.app that executes the your-shell-script.sh script.

After that, you can very easily add a custom icon to the app if you want to.

Adding a custom app icon

Script Center 1.0 For Macos Sierra

1. Create an .icns file or a 512×512 PNG image with the icon you want, and copy it to the clipboard (⌘ + C). (Alternatively, copy it from an existing app as described in steps 2 and 3.)
2. Right-click the .app file of which you want to change the icon and select “Get Info” (or select the file and press ⌘ + I).
3. Select the app icon in the top left corner by clicking it once. It will get a subtle blue outline if you did it right.
4. Now hit ⌘ + V (paste) to overwrite the default icon with the new one.

Note that this will work for any file or folder, not just .app files.

Examples

Chrome/Chromium bootstrappers

I like to run Chrome/Chromium with some command-line switches or flags enabled. On Windows, you can create a shortcut and set the parameters you want in its properties; on a Mac, you’ll need to launch it from the command line every time. Well, not anymore :)

The & at the end is not a typo; it is there to make sure Chromium is launched in a separate thread. Without the &, Chromium would exit as soon as you quit Terminal.app.

Launch a local web server from a directory

Script Center 1.0 For Macos 10.13

Say you’re working on a project and you want to debug it from a web server. The following shell script will use Python to launch a local web server from a specific directory and open the index page in your default browser of choice. After appifying it, you won’t even need to open the terminal for it anymore.

More?

Macos Shell Script

Needless to say, the possibilities are endless. Just to give another example, you could very easily create an app that minifies all JavaScript and CSS files in a specific folder. Got any nice ideas? Let me know by leaving a comment!