Gravity DMG

The second major feature group is One-Click Notarization combined with Secure Signing. Gravity DMG automates the full code signing and notarization pipeline, starting with automatic signing of the .app bundle while enabling Hardened Runtime and preserving all entitlements. With a single click, the tool uses Apple’s notarytool API to upload your application for notarization, handling the entire submission and waiting for approval without any manual intervention. This eliminates the need to run separate commands for codesigning, notarization, and status checking. The process is secured by integrating with the macOS Keychain, where your Developer ID and Notary profiles are stored; no credentials are ever written to disk. David M., a macOS engineer, praised this feature for eliminating struggles with codesign and failed uploads, ensuring a smooth, automated release every time.

The third feature group encompasses Keychain Integration, Smart Compression, and Build Templates. Gravity DMG securely manages your Apple Developer ID and Notary profiles by storing them in the macOS system Keychain, so credentials never appear in plain text files or configuration scripts. This approach reduces security risks and simplifies multi-machine use, as profiles can be shared across your machines via iCloud Keychain. Smart Compression offers three disk image formats: UDZO for maximum compatibility with older systems, ULFO for faster mounting on modern Macs, and UDBZ for the smallest file size when bandwidth is a concern. These options are presented through a simple dropdown, removing the need to remember terminal flags. Build Templates allow developers to define dynamic naming conventions using variables like ${VERSION} and ${DATE}, ensuring every release follows a predictable pattern. Templates can be saved for reuse, creating a consistent release pipeline even without CI/CD integration.

Gravity DMG's workflow is designed to be as intuitive as it is powerful. Starting with a raw .app bundle, users simply drag it into the Visual DMG Editor, where they can apply a space-themed background, arrange shortcut aliases, and adjust window layout. After selecting the desired compression format and naming template, a single click initiates the build process. Internally, Gravity DMG automatically signs the application with your Developer ID, enables Hardened Runtime, preserves any custom entitlements, packages the disk image using the chosen compression, and submits it for notarization via Apple’s notarytool API. Progress is monitored in real time, and upon successful notarization, the final DMG is ready for distribution. This unified workflow replaces multiple command-line steps, reducing the chance of errors and cutting release time from hours to under a minute.

Concrete use cases and outcomes: Indie developers like Jessica L. use Gravity DMG to create professional-looking DMGs quickly, using the visual editor to apply a "Cosmic" background that makes their app look polished without design effort. macOS engineers like David M. leverage the automated notarization pipeline to eliminate the headaches of codesign and failed uploads, ensuring each release passes Apple’s security checks. DevOps leads such as Emily R. appreciate the Keychain integration for security, and product managers like James F. value the one-time lifetime license for predictable costs. The tool is especially useful for teams that distribute updates frequently, as the Build Templates ensure consistent naming and organization across versions. Ultimately, users achieve faster, more reliable releases with a professional presentation that enhances user trust and download conversion.

Gravity DMG is designed for macOS developers, indie creators, macOS engineers, DevOps leads, and product managers who require a reliable tool for signing, notarizing, and packaging macOS applications. The software requires macOS 13.0 Ventura or later and performs exceptionally well on both Apple Silicon and Intel architectures. A free 7-day trial gives full access to all features without requiring a credit card. For continued use, a Pro License is available for a one-time payment of $14.99, granting lifetime updates, priority support, and the ability to use the license on up to two Macs. This straightforward pricing model appeals to professionals who prefer owning their tools rather than paying recurring subscriptions. Trusted by high-performance teams, Gravity DMG ultimately delivers a streamlined, secure, and visually polished approach to DMG creation, reinforcing its primary value: enabling developers to ship their Mac apps in style.