This from the Adobe Photoshop CS5 system requirements page: "1024x768 display (1280x800 recommended) with qualified hardware-accelerated OpenGL graphics card, 16-bit color, and 256MB of VRAM" Note that this is the general requirements to run the program, not for the GPU-accelerated features that need further support for Shader Model 3.0 and OpenGL 2.0. However, there's no explanation of what exactly is a "qualified" graphics card. It's been raised on John Nack's blog, but with no answer as yet (as of 13th April, John is "looking for more details"). So, anyone any ideas? Does this mean for example that PS CS5 won't run on a Mac without a discrete video card (i.e. all Mac Minis, low end MacBook Pros, the MacBook, and low end iMacs)? The 256MB requirement would also seem to eliminate earlier aluminium iMacs with the 128MB cards and most of the white Intel iMacs. Any help much appreciated - thanks.