I am new to R. I am running it on a Mac with Osx. I want to run the package systemfit on a problem I have but get a response that the package was not properly installed. I 've perused the manuals but cannot seem to find the instructions for installing separate packages on R under the mac. I'd be very appreciative if someone spelled out the instructions. I put the package in the library directory, but I guess there is more to it than that. Thanks. Roger Coupal Dept. of Agricultural and Applied Economics University of Wyoming 307.766.5246 http://Agecon.uwyo.edu/EconDev http://uwyo.edu/openspaces/index.html