Encountered a strange error when using hdiutil to create a dmg file in OSX 10.7.5

I have encountered the same problem on 10.8.

By adding the -debug flag, I see that hdiutil is trying to grow the DMG by 2 blocks (1 KB) after copying all of the files in. I wonder if this is for alignment purposes? I have not tried playing with alignment settings.

The empty file trick worked. I used .Trash, though if I then add -scrub to the command line, the problem returns.

I eventually settled on working around this by adding -stretch 1g to the command line. Interestingly, -stretch 4g did not help.

It would be nice if Apple would have a look at this issue and confirm whether this is a bug or expected behaviour.

What's stopping you from filing a bug report?

That's how Apple prioritizes most user reported bugs (by the number of bug reports filed) and is the best way to get something fixed (if it's broke).

I just assumed that something called an "Apple Support Community" would have the ear of Apple's Support. My mistake. I will file a bug.

You file bug reports here: https://bugreport.apple.com/

I'm late to the party, but this may help someone: Creating .Trash alone didn't help... but as soon as I deleted .DStore all was well again :-)

I'm even later to the party:

You can optionally specify a '-size' parameter when you invoke hdiutil. If you specify a size large enough that the disk image doesn't need to be resized during .dmg creation, it seems you can avoid this error.

E.g.:

hdiutil create -size 240m -fs HFS+ -srcfolder test -volname Test test.dmg