To stop logging messages, like that, on Syslog:
14/12/14 10:38:24,521 WindowServer[235]: _CGXGLDisplayContextForDisplayDevice: No matching context for device (0x7fdf63610e10) – disabling
14/12/14 10:38:24,521 WindowServer[235]: _CGXGLDisplayContextForDisplayDevice: No matching context for device (0x7fdf63610e10) – disabling OpenGL
14/12/14 10:38:24,561 WindowServer[235]: _CGXGLDisplayContextForDisplayDevice: No matching context for device (0x7fdf63610e10) – disabling OpenGL
14/12/14 10:38:24,573 WindowServer[235]: _CGXGLDisplayContextForDisplayDevice: No matching context for device (0x7fdf63610e10) – disabling OpenGL
14/12/14 10:38:25,243 WindowServer[235]: _CGXGLDisplayContextForDisplayDevice: No matching context for device (0x7fdf63610e10) – disabling OpenGL
14/12/14 10:38:25,274 WindowServer[235]: _CGXGLDisplayContextForDisplayDevice: No matching context for device (0x7fdf63610e10) – disabling OpenGL 14/12/14 10:38:25,293 WindowServer[235]: _CGXGLDisplayContextForDisplayDevice: No matching context for device (0x7fdf63610e10) – disabling OpenGL
Is needed to modify ASL configuration, adding, at the begining of /etc/asl.conf , the line:
? [CA= Message _CGXGLDisplayContextForDisplayDevice] ignore
and restarting the Syslogd
sudo killall -HUP syslogd