DropDMG Public Beta and macOS 10.12 Sierra

You can click this link (after installing DropDMG) to join the public beta program and receive updates via the built-in Software Update… command. Click this link to stop receiving beta updates.

The beta release notes are available in the Software Update window and also in the Version History section of the manual (in the Help menu).

This thread will be updated with information about compatibility with macOS 10.12 Sierra as it becomes available.

We do not recommend using a macOS beta on your main Mac, as there may be bugs that we have not had time to, or cannot, work around. With that said, we do welcome bug reports so that we can investigate any bugs and report them to Apple or try to develop workarounds. Please submit any feedback or bug reports via e-mail, rather than posting here.

DropDMG 3.4b1 is now available. Some of the highlights are:

  • Added support for creating disk images that are signed for Gatekeeper, as Apple now recommends that Mac applications be distributed on signed disk images (requires Mac OS X 10.11.5 or later). This is described in the Signing section of the manual.

  • Added support for the .xip archive format, which lets you create secure archives that are signed for Gatekeeper (requires Mac OS X 10.8 or later).

  • Added the Verify Signature… command for checking disk images and “.xip” archives to make sure they are correctly signed (requires Mac OS X 10.11.5 or later).

  • The New Blank Disk Image… command now lets you choose the File System
    , which can be any variant of HFS+ as well as Apple File System (APFS), Apple’s experimental next-generation file system for 2017. This feature is particularly useful for developers who want to make sure that their apps work properly on each file system.

DropDMG 3.4.3b1 works around an issue that could cause a -10,000 error when creating a disk image with a layout on macOS 10.12.