mkdmg

The Fancy Apple Disk Image Creator

A powerful, modern CLI wrapper around hdiutil that makes creating, signing, and notarizing macOS Disk Images effortless.

Download GitHub

go install al.essio.dev/cmd/mkdmg@latest

🚀

Simple

Create DMGs with a single command. Just provide a JSON config file.

⚙️

Configurable

JSON configuration support for reproducible, automated builds.

📦

Multiple Formats

Supports UDZO, UDBZ, ULFO, and ULMO disk image formats.

🔐

Code Signing

Integrated codesigning and notarization workflow built in.

🖥️

Filesystems

Full support for both HFS+ and APFS filesystems.

🛡️

Sandbox Safe

Create disk images that are safe for sandboxed applications.

Quick Start

        # Run with default config (mkdmg.json in current directory)

        mkdmg

        # Override output path and source directory

        mkdmg MyApp.dmg ./build

        # Use a specific JSON config file

        mkdmg --config path/to/config.json

        # Dry run to preview commands

        mkdmg --dry-run --verbose

Options

Flag	Description	Default
`--config`	Path to a JSON configuration file	`mkdmg.json`
`--dry-run`, `-s`	Simulate without creating files	`false`
`--verbose`, `-v`	Enable verbose output	`false`
`--version`, `-V`	Print version information and exit
`--help`, `-h`	Display the help message and exit

Supported Formats

UDZO zlib

UDBZ bzip2

ULFO lzfse

ULMO lzma