HyperDither uses an elegant color reduction (dithering) routine to turn color or grayscale images into black and white or grayscales. The visual effect produced by this technique creates rich, velvety tones, and is higher-quality than the “Diffusion Dither” method offered by Photoshop.


In the early 1980s, while developing the graphics technology for the first Macintosh, Bill Atkinson (HyperCard, QuickDraw, MacPaint) discovered a very elegant filter to convert greyscale image data for display on the Mac's 1-bit black-and-white screen.

Later, this graphics routine was implemented as an option in Apple’s HyperScan software, connecting early Macs to flatbed scanners, and nowhere else. HyperScan and the excellent Atkinson dithering routine were subsequently unavailable for many years—but not forgotten!


• macOS 10.14 (Mojave) or later
• Dark mode support

From Tinrocket, award-winning creator of apps to inspire creativity: Waterlogue, This by Tinrocket, and Olli by Tinrocket.

What’s New

Version 2.0.1

HyperDither 2.0 is a complete rewrite based on the powerful, modern, document-based editor behind our macOS version of Waterlogue.

• Now includes several popular diffusion dither techniques
• Support for 2 to 256 gray levels
• Create and save custom styles
• Optional document-based workflow
• 64-bit compatibility for current and future macOS versions

New in 2.0.1:

• Fix for image export
• The "Classic" is now the default for new documents
• Fix for default document settings on both new and restored documents
• Miscellaneous fixes and improvements

Note: We removed batch processing from this version, because, as some of you know, it's been broken for a while. We are very sorry about that, and we are working to bring it back as soon as possible!

Coming soon: Color!

If you like HyperDither, please consider leaving an App Store review or rating—we’d appreciate it! Your opinion counts and helps indie developers like ourselves. :)

We’re here to help: If you have a question or need assistance, you can always email us at

Thanks again!


Tinrocket, LLC
4.3 MB

macOS 10.14 or later, 64-bit processor



Age Rating
Rated 4+
© Tinrocket, LLC
129,00 Kč


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

More By This Developer