Whenever I play with the Sildurs Shader on my Mac, I usually have less than 10 FPS. I have no idea why other shaders work. Which shaders do you actually play with?
Then your Mac won't grab this shader
Each shader has its own performance. There are shaders that use more FPS than others. Depending on how much the graphic is set.
Shaders can require different amounts of power. Possibly Are also very energy-intensive settings in the shader. I also use the sildursshader. What you could try is to deactivate various functions of the shader, but also to turn down the graphics in general. Above all, a lower range of vision can bring a lot. Sildurs also offers various shaders that require different amounts of computer power: Lite, Medium, High, High-Motionblur, Extreme and Extreme Volumetric lightning. https://sildurs-shaders.github.io/downloads/
