Apple's installer checks for the GFX card and doesn't allow Aperture to be installed. There's a hack around this and after that's applied Aperture works fine on a GMA950 Mac Mini.
BTW - Core Image support on GMA950 is full Core Image, not some cut down version, I believe the only reason Aperture isn't officially supported is that it requires a GFX card with more than 64Mb of VRAM. For the same reason Aperture will not work on my PowerMac G5 (64Mb NVidia FX5200).