@User Hi Tim. I'm trying to build magic from an xterm on Mac OS. Cairo is installed and detected by the configure script. However, when I run make, it throws errors about not being able to find OpenGL headers: bash-3.2$ make --- errors and warnings logged in file make.log --- making dependencies grTOGL1.c2210: fatal error: 'GL/gl.h' file not found grTOGL2.c1310: fatal error: 'GL/gl.h' file not found grTOGL3.c1410: fatal error: 'GL/gl.h' file not found grTOGL5.c1210: fatal error: 'GL/gl.h' file not found grOGL1.c1010: fatal error: 'GL/gl.h' file not found grOGL2.c2310: fatal error: 'GL/gl.h' file not found grOGL3.c2410: fatal error: 'GL/gl.h' file not found grOGL5.c2110: fatal error: 'GL/gl.h' file not found --- making modules --- compiling bplane/bpEnum.o