If you don't have this, the simplest way to get them on recent versions of macOS is to type 'gcc' on the command line and follow the prompts. Compiling MOD files requires the command line tools. Otherwise, you can go to the independent XDarwin site ( ) and install from there. If you have OS X 10.3 or later, the X11 installer may already be on your hard drive, or on one of the system CDs. Solution: This happens when you try to use the X11 version of NEURON but X11 hasn't been installed on your Mac. Previous versions of macOS would install X11 automatically, but now you have to install xquartz from Problem: No gui when NEURONDEMO is launched. Problem: nrngui and neurondemo fail, and the error message says something aboutĭyld: Library not loaded: /opt/X11/lib/libX11.6.dylib Solution: X11 is missing.
