Zyn-Fusion (Zynaddsubfx 3.0) GUI fails to load.

On macOS High Sierra 10.13.3, clicking the "View Plugin" button for Zyn-Fusion ( http://zynaddsubfx.sourceforge.net )
results in a black screen. Plugin receives MIDI and outputs audio just fine. Plugin GUI works fine in Reaper, MuLab and Ardour. I reported it to the Zyn-Fusion developer, Mark McCurry and he said, "I'm guessing that Audio Plugin Player puts the openGL context into an unexpected state as the GUI seems to work with other hosts."


  • Thanks for the report - I can reproduce your experience using the Zyn-Fusion v3.03r20 demo, using the app in both 32 or 64 bit modes. I'll have to investigate with Cycling 74, as I'm dependent on Max's plugin support within Audio Plugin Player.

    If I have any updates I will post here - apologies for the problem regardless.
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