I am not enrolled, so I don't have access to the cs50 appliance. I have followed the instructions for installing the files for a mac. I've read numerous threads for the issue, and tried to implement the instructions in those threads. I did however notice that there wasn't an accepted answer. I tried to locate the dirs for stdio.h and ctype.h then drag and drop the cs50.h file to those dirs. there are multiple dirs for the standard files.
usr/include/c++/4.2.1/tr1/ctype.h and usr/include/ctype.h
there is a copy of cs50.h in both this dirs as well as the one created by command line inputs for installing the file
However I have been successful with #include "cs50.h" and placing a copy in the directory that contains my source code.
Has anyone had success with the previous "ideal" method?