Syphon lets Mac apps hand each other frames directly on the GPU: a generative patch publishes its output, a VJ mixer consumes it as a source, same machine, effectively zero latency. Since 2010 it has been the connective tissue of Mac visual rigs.
The pattern it enables is modular performance: generate in one tool, composite in another, output from a third, each doing what it is best at. Most serious Mac visual software speaks it.
Windows’ equivalent is Spout; between machines the job passes to NDI. Anyone building a multi-app rig learns all three names in the first week.
Photism sends Syphon from its output window on macOS 14 and later, in the VST3, the Audio Unit and the standalone app. Turn it on in the top bar and pick the Photism source in your receiver.