I might be getting beyond my experience here… but I’m looking at OpenCV.Build.cs, OpenCVHelper.Build.cs, and OpenCV.uplugin. OpenCV.uplugin lists “Mac” as an allowed platform, however, OpenCV.Build.cs only adds IncPath
to the engine include paths for Win64 and Linux. Without that I would not expect it to find the hpp file. Is it possible that OpenCV doesn’t actually support Mac?