Hello, I have an iMac with MacOs 10.7 I'm trying to run a code (not my own code) written in Future Basic 5, using gcc 4.2 compiler (I already installed XCode 4.5). All it says (the c compiler) is that a SDK file or path is missing. I got to the point that it says it requires the file MacOsX10.5.sdk or MacOsX10.6.sdk (if I try to compile it for 10.6). I need that file and cannot get it anywhere. I think I have a MacOs 10.6 DVD (not me, but a coworker). Can I extract it from there? How? Thanks for any help you can give me.