Please attach the output of bless --help.

It works on 12.2.1 so maybe they removed that option it the 12.3 beta.

12.3 beta.

12.3 was released today.

Please attach the output of bless --help.

That doesn't help much as all options are listed.

However man bless shows a different set of options for Intel and a different set of options for Silicon. --openfolder is not an option listed for Silicon.

I'm updating to 12.3 to test that one. Just checked that not using that option does not seem to affect on the DMG opening in the Finder when mounted.

Will test tomorrow on older OSs and if not using that argument does not affect on most OSs maybe we can get rid of it instead of detecting  Silicon and limiting to Intel or 12.2.1-.

I tested with the whole line removed and also with the offending part removed:

bless --folder "${MOUNT_DIR}"

In both cases it seemed to be OK.

In both cases it seemed to be OK.

Indeed! Tested it in as low as Mac OS X 10.6. So maybe that bless was only needed in older OSs.

Probably then the best way is to set the bless step as optional and not used by default.

I have the same problem after upgrading to macOS 12.3 on Mac Mini M1 with original stable version of create-dmg script.

Suggested change to remove "bless --folder ... " line cures the problem.

Just released 1.0.10 with this issue fixed: https://github.com/create-dmg/create-dmg/releases/tag/v1.0.10
Also the brew update is on it's way: Homebrew/homebrew-core#97089

Thanks for the fast response. 👍