On Feb 14, 2018, at 2:24 PM, vrotaru.md@gmail.com wrote:

Well, since I have no experience with Macs I can only guess, but the basic workflow is the following:

The configure.sh script tries to find the "X11/Xlib.h" file and to compile and link a simple C program using the X headers and libs. If this fails it assumes that X is not installed and does not build the "Graphics" module.

That's the bare-bones version, but as I said, I have no experience with Macs:

That's what a quick search have provided me with: https://stackoverflow.com/questions/14321038/x11-xlib-h-no-such-file-or-directory-on-mac-os-x-mountain-lion

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   Vasile Rotaru