if ArcadeFlow's shaders comply with the GLSL 1.10 specs it will run, I'm using GLSL 1.30
I could in theory downgrade it to GLSL 1.10, but I don't have any platform to test it on atm.
This is also the reason why it does not run on older Macs. I'll have to think about it.
I didn't have the time yet to test Ambience HD on my late 2013 macbook pro (due to the
demon puppy we recently acquired
) but you are right, Arcadeflow is using OpenGL 1.1 or 1.2, there are many things in 1.3 that are not supported on my Mac and I do most of the development here (example: you can't get a specific mipmap level, for example the first mipmap level to get the average texture color, it works in Windows, not on the Mac)