- The application will be located in /Applications.
- The application will be downloaded via a web browser and not via the App Store.
- The language being used is Tcl/Tk.
A. Will this work on all versions of OS X 10.5 or higher?
B. Is there a better place to store application files?
~/Library/Application support is a way better place to store your files:
Use this directory to store all app data files except those associated with the user’s documents. For example, you might use this directory to store app-created data files, configuration files, templates, or other fixed or modifiable resources that are managed by the app. An app might use this directory to store a modifiable copy of resources contained initially in the app’s bundle. A game might use this directory to store new levels purchased by the user and downloaded from a server.
A. No, generally you should not alter the application bundle once installed. You will very likely encounter permissions or code signing issues if you do.
B. ~/Library/Application Support/MyApp/
来源：https://stackoverflow.com/questions/22694662/mac-os-x-can-i-write-application-files-within-the-app-bundle