X11 (XQuartz) not being found

I don't know if this is the right section but it seemed to be where the most people who would understand my problem would be. I've installed a large physics simulation package and part of the requirements for it is to have X11 or XQuartz installed. When trying to run the program and I launch an XQuartz terminal and after typing in the commands to run the program I get the following:


As well as a prompt that says "You need to install X11. Would you like to install X11 now?" Obviously I have X11 installed as I am launching the program from an X11 terminal so I'm not sure what to do. Running echo $PATH I get the following:


I see X11 in the path but I am wondering if it needs to be in /usr/X11 rather than /opt/X11. If so, I wouldn't know how to go about changing and if it's something else then I am not sure.

Have you been here, or the linked XQuartz site:
https://support.apple.com/en-ca/HT201341

OS X has a very non-traditional file system layout so it's very possible that X11 is called or expected somewhere where it's not. With that in mind, let's start simple. What is the name of this package and does it specifically support OS X? Did you build it or did it come pre-compiled? If it was the latter, how did you build it?

So first: I have been to the XQuartz site and I have the most up to date version of XQuartz so I'm not sure if there is anything else that can be offered from that site right now.

Second: The package is called MCNP6, radiation transport code. It does specifically support OSX and it came pre compiled. There is a script file used to uncompress and install data libraries, install the code, and add the paths to the bash. I have actually installed the software on 5-6 other OSX machines and have never had a problem before. It's rather ironic that the problems start up on my computer but it always works when I do it for other people.

A little update: I've been playing around with uninstalling and reinstalling XQuartz to no avail. After some digging I found the version 2.7.8_rc1, the current version is 2.7.7, and installed that and everything is working now. I find it a bit odd since this is an old version of the software but nonetheless it is now working.

Uh, 2.7.8 is not older than 2.7.7. What you have is the release candidate for 2.7.8, hence the _rc1.
Where exactly did you get this application? Everything I've found so far is source code with data and a few auxiliary binaries.

cradom said:

Uh, 2.7.8 is not older than 2.7.7. What you have is the release candidate for 2.7.8, hence the _rc1.
Where exactly did you get this application? Everything I've found so far is source code with data and a few auxiliary binaries.

Click to expand...

My last sentence was unclear. I meant to say I have an old version of MCNP but it works with a newer version of XQuartz.

I'm curious where you found the source code for it? It's export controlled software by the US government so I have to apply for a license from these people. Older versions of it aren't export controlled though. I think it's just anything released post 9/11 era. There is another code developed by CERN that is similar in nature called Geant4 and is not export controlled.

Sorry, didn't find the source, found instructions on building from source.
Looking at your first error message it looks like there is a bug in the code.
Possibly why it thinks there's no X11 installed. It is correct, the newer versions are in opt, not usr.