Version 1·1·0

Definitely one for the fern enthusiasts, Fronds is a screen saver that draws never-ending fractal ferns. New ferns gradually appear while the old ones slowly fade out.

Fronds is a homage to my old Windows screen saver Ephemera — I still remember its ferns mode fondly more than 20 years after I first released it.

Fronds uses IFS fractals to draw the ferns, which continues a long association for this type of fractal: the Barnsley fern is one of the classic examples of an IFS.


  • macOS 10·13 High Sierra or later.



Release Notes

  • Version 1·1·0 — 16th January 2023
    • Fronds is now built as a Universal Binary, meaning it will run natively on Apple Silicon Macs. This may result in a slight improvement in efficiency, but really shouldn’t work any differently.
    • Added a workaround to fix a problem with screen savers built using Xcode 14·2 failing to show the preview in System Preferences.
  • Version 1·0·2 — 25th September 2021
    • The Fronds screen saver is now signed and notarized by Apple, meaning it will run without trouble on recent versions of macOS.
    • This release is the same as 1·0·1 with the addition of signing.
  • Version 1·0·1 — 28th June 2020
    • Fixed a memory leak.
    • Improved the Metal kernel that draws the ferns, so it will run more efficiently now.
  • Version 1·0·0 — 23rd June 2020
    • Initial public release.