I am facing issue to make some of my applications that run under XQuartz work. This happened after I have updated my OS to Sierra version. I didn't have these issues with the previous OS versions. when I try to Open any of my application like Winskin, and other applications in my field. I get the error message that is titled The application X11 could not be opened. and follows with An error occurred while starting the X11 server: "Failed to activate core devices." this for Winskin. in another application, ADF, ADF I got "An error occurred while starting the X11 server: "Unrecognized option: -iglx". I looked it up online, I haven't find a solution yet. Any advice would be appreciated. Thank you !