This is a different shader problem then the one mentioned in the post below. I didn’t want to hijack that thread.
Very recently I upgraded from EIAS 4.0 to 7.0. (Yeah, I know, a long vacation from 3D). I installed the 7.0.1 upgrade and then installed the raindrops shader I found right below it on this site. I also installed some of the shaders that came with the DVD, including DirtLayerLite, Pits and RGBFilter.
When I am in the material editor and try and select these shaders, the dialog box says “not a shader. “ I installed the Mac shaders in my 7.0.1 EI shader folder. But they do not seem to work. Am I missing something?