This file should generally be “hidden” in the disk image, and (according to warnings I chose not to test) needs to be in a subfolder, not the root of the disk image. The first step is to create the desired background image (which is left as an exercise for the reader) it should probably be a non-lossy PNG file for best results. The basic approach is to create a writable disk image first, with the desired contents (including the background image), then arrange this malleable window as desired, and finally convert that into a final (read-only) disk image for distribution.

In our first few attempts, we managed to have backgrounds that showed only on the development system, but disappeared (rather, never appeared) when downloaded to another system. (The trial version is fully-featured, and for only $20 the decision to purchase took no deliberation.)Įven with this tool making life easier, it is important to note that the process is slightly convoluted, primarily because one needs a relative path to background image. Not only does this save time and hassle, but it provided an added feature that we did not even know we wanted. Upon a recommendation in the private ASP ( Association of Shareware Professionals) newsgroups, however, we tried and settled on an inexpensive third-party tool called DropDMG, from C-Command Software. We accomplished what we wanted (the image above being an actual screen capture from our upcoming release), and this is how we did it.įirst of all, this can be accomplished, in theory, using the ‘Disk Utility’ and other free tools included with Mac OS X, provided a certain amount of legwork both in figuring out and then in executing the process. In addition to this display when the disk image is mounted, we also wanted to add a license agreement before that happened. Note that the ‘Pretty Good Solitaire’ and ‘Readme’ icons are live, while the rest of the window is simply a background image. This gives a much better initial experience, being not only more visually appealing, but also providing some initial instructions (text in green). The only problem is that, when mounted, it appears simply as a plain window with the bundle (and any additional files) in it. By following that method, using free tools from Apple, you can create a basic disk image (.dmg) file that is suitable for downloading. In a previous posting, I explained the basics of making Macintosh Disk Images for software distribution. (Building disk images under Tiger or Leopard works fine.) Important update: Be sure to read Disk Images Revisited, the quick synopsis of which is that this method does not work properly on Snow Leopard due to a Mac OS X bug.

This is how to add that “curb appeal” to your Macintosh disk images.

Compressed mac os x dmg image unmotable