kageroumado Releases Rilmazafone, a Visual Designer for Signed macOS DMG Installers

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.

A disk image is often the first thing a user sees of a Mac application. Rilmazafone lays it out 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

Availability

Rilmazafone is available on the Mac App Store for US$19.99 and requires macOS 26 Tahoe. The source code is published on GitHub under the MIT License. More information is available at kagerou.glass/rilmazafone.