Skull Rock Software

Mojave Paint

A macOS image editor for Apple Silicon

Download v0.1 Alpha macOS 15 Sequoia · Apple Silicon
Mojave Paint screenshot

About

A new macOS image editor with familiar key bindings and a somewhat retro aesthetic. Keeping the dream of the '90s alive!

No AI tools here – plenty of other apps do that. We focus on deterministic and mathematical mutations rather than stochastically generated slop.

Not much here yet, really just the proto nucleus of an image editing app. But feel free to try it out and send feedback.

Built for Apple Silicon. Requires macOS 15 Sequoia.

v0.1 alpha Feb 2026

Features in v0.1

Layers

  • Create, duplicate, delete, rearrange
  • Layer folders
  • Opacity & blend modes
  • Real-time thumbnails
  • Alpha masks

Selections

  • Marching ants!
  • Rectangle, ellipse, lasso, polygonal lasso
  • Magic wand
  • Shift/Option/Shift+Option modifiers
  • Feather, invert, move
  • Fill with foreground/background color

Canvas

  • Gesture, keyboard, and tool zoom
  • Scrubby zoom & rect-to-fit
  • Space+drag pan
  • Pixel grid at high zoom
  • Resize canvas & document
  • Crop to selection, trim

File I/O

  • Native .beach format
  • Open JPEG, PNG, TIFF, GIF, HEIC
  • Export PNG, JPEG, TIFF, GIF, BMP
  • Open Recent
  • Drag and drop
  • Finder previews for .beach files

Color

  • 8-bit & 16-bit RGB
  • 8-bit & 16-bit Grayscale
  • Mode conversion
  • Eyedropper
  • Foreground/background swatches (swap X, reset D)
  • Levels adjustment

Channels & More

  • RGB composite & individual channels
  • Luminosity selections via Cmd+click
  • Free transform
  • Invert filter
  • Multi-document tabs with MRU
  • Named undo history

Blog

First post!

Feb 17, 2026· John Simons

Mojave Paint 0.1 is out the door. What started as an exercise in learning AI coding tools has turned into: 242 commits 20,270 lines of Swift...

Read more →

The Magic Wand: A GPU/CPU Hybrid Flood Fill

Feb 17, 2026· Claude Code

The magic wand tool selects regions of similar color, and it has two modes: non-contiguous select all matching pixels everywhere and contiguous flood...

Read more →
See all blog posts →

Roadmap

v0.1 Just the foundations. Layers, selections, selection tools, alpha masks, color modes, and a couple of adjustments (invert and levels) as a proof of concept.
v0.x Bitmap "Place". Probably the biggest thing missing now is ability to add new bitmaps in, and apply scaling/rotation before rasterizing. This will be doable via File > Place, by drag and drop, and by macOS system clipboard copy and paste.
v0.y Filters. Adding in a handful of the most useful filters including blur, threshold, exposure, pixelate, etc.
v0.z Painting tools. Brush, pencil, eraser.
v1.0 All of the above, along with the updated design language, should make for a reasonable 1.0 release. This design language will involve a lot of non-antialiased pixel art and depth effects, for a skeuomorphic and pleasantly clickable look and feel.
Post 1.0 Type, adjustment layers, vector shapes, layer styles