DropDMG

DropDMG enables macOS users to create, convert, and customize disk image files (.dmg) and other archive formats through a drag‑and‑drop interface. It automatically determines the appropriate action—building a new image, converting to another format, or joining files—based on the supplied input. The tool supports all native macOS disk image types, including writable .sparsebundle, .sparseimage, and legacy .img files, and offers modern LZFSE compression for smaller images.

Beyond basic creation, DropDMG allows detailed configuration of the image’s appearance and behavior. Users can add a custom volume icon, arrange icons on a Retina‑optimized background, include a software license agreement, and code‑sign the image to satisfy Gatekeeper requirements. It also handles cross‑platform archives such as .zip, .tar, .tar.gz, .tar.bz2, and hybrid .iso images, and can produce bootable macOS installer disks.

Automation is supported via AppleScript, Automator, and a command‑line utility, enabling integration into build scripts, Xcode projects, or Makefiles. Configurations can be saved for reuse, and temporary options allow one‑off adjustments. The software is stable, works on macOS 10.13 through macOS 14, and is suitable for developers and power users who need reliable disk image creation and archival workflows.