The 4.0 version of Subsume for Mac was provided as a free download on our website. The actual developer of this software for Mac is Subsume Technologies, Inc. Subsume for Mac lies within Theming Tools, more precisely Screensavers.
From the developer:
Subsume Technologies signature screen saver, Subsume puts small squares on your screen, subsuming them into larger ones as the screen fills.
You may want to check out more Mac applications, such as scarytime v9, Christmas Tree Creator '04 or SaverPreview, which might be similar to Subsume.