Syphon broken in latest OBS Studio version

mark_the_mark · October 28, 2025, 9:07am

OBS Studio just updated the way they handle Syphon, breaking TD → OBS Studio syphon connection. They’ve said other programs (Such as TouchDesigner) need to update to follow the newest Syphon standards. I had to downgrade OBS Studio back to 31.1.2 to get it working again with Touchdesigner.

TD Build: 2023.1280

Operating System: MacOS Sequoia 15.7.1

github.com/obsproject/obs-studio

Comment by gxalpha - libobs-opengl: Treat pixel format 0 in IOSurface as 32BGRA; mac-syphon: Use opaque effect on non-OpenGL renderer

master ← gxalpha:syphon

Update: The upstream Syphon fix (Syphon/Syphon-Framework#103) has been merged. A…pps can make themselves compatible with the currently released version of OBS (32.0.1, only OpenGL renderer) by updating to that version of Syphon Framework (current main branch, at least commit Syphon/Syphon-Framework@71351d4b484cd2d1917867f7846a5cdca724552d). The relaxation made by this PR for the OpenGL renderer is still pretty much required because many apps likely won't update immediately. For the Metal renderer, both this PR (the shader fix) *and* an update by the developers of server apps to the new Syphon Framework are needed.

bangnoise · October 29, 2025, 10:19am

Hi - my understanding was that future versions of OBS Studio were going to fix this so they continued to work with existing Syphon servers. What’s the latest version of OBS Studio you tried?