Press release · Rilmazafone
kageroumado Releases Rilmazafone, a Visual Designer for Signed macOS DMG Installers
Rilmazafone is a Mac app for designing DMG disk image installers on a WYSIWYG canvas that mirrors the mounted Finder window, then building a signed disk image in one click. Free and open source, also available on the Mac App Store.
Published · Updated . Features and availability describe the product at the update date.
On February 20, 2026, kageroumado released Rilmazafone, a macOS application for designing and building DMG disk image installers. Rilmazafone arrived on the Mac App Store on July 20, 2026.
Rilmazafone lays out a disk image on a canvas that mirrors the mounted Finder window exactly, including icon size, grid and window bounds, so the design matches what users will see when they open the image. Guides snap icons to centers, thirds and neighboring items.
Backgrounds are built from layers of images, gradients or solid colors, with color adjustments, vignette, bloom, and linear or radial variable blur previewed live. Styled text and SF Symbols can be composited into the background, and per-icon frosted glass panels keep file names legible on any image.
A single Build command produces the finished disk image in UDZO, UDBZ, LZFSE or LZMA format, on HFS+ or APFS, signed with a code-signing identity from the user's keychain.
Key features
- WYSIWYG canvas that mirrors the mounted Finder window
- Layered backgrounds with blur, vignette and bloom
- Text, SF Symbols and frosted glass panels under icons
- UDZO, UDBZ, LZFSE and LZMA; HFS+ or APFS
- Code signing with a keychain identity in one click
How it compares
| App | Price | License | Layout editing | Signing and notarization |
|---|---|---|---|---|
| Rilmazafone | Free; optional Mac App Store edition US$19.99 | MIT | Visual canvas; command line in the GitHub edition | Signs, notarizes and verifies (GitHub edition) |
| DMG Canvas | US$30 | Proprietary | Visual editor; command-line tool | Signs and notarizes; notarization requires Xcode |
| DropDMG | US$24.99 | Proprietary | Built-in layout editor; command-line tool | Signs; notarization through separate tools such as SD Notary |
| create-dmg | Free | MIT | Shell script; background and icon positions set by flags | --codesign; --notarize waits and staples |
| create-dmg (npm) | Free | MIT | Command line; generates its own design | Signs automatically; notarization is a separate step |
| dmgbuild | Free | MIT | Command line with a settings file | No signing or notarization setting in its docs |
Availability
Rilmazafone is available as a free download from kagerou.glass/rilmazafone and GitHub, and on the Mac App Store for US$19.99. It requires macOS 26 Tahoe or later. The source code is published on GitHub under the MIT License. More information is available at kagerou.glass/rilmazafone.
About kageroumado
I'm Mado Kagerou, publishing as kageroumado: an independent researcher and expert Swift engineer with more than ten years of software development experience. As a founder and technical lead, I take projects from architecture through release. My research interests center on computational pharmacology, computational neuroscience and AI safety. My engineering specialties include Apple platform internals, reverse engineering, GPU rendering and local model training.
Research, engineering work and leadership experience
Media contact
kageroumado · [email protected] · kagerou.glass