--- configure	2004-11-16 09:50:21.000000000 -0500
+++ configure	2026-04-29 17:36:32.000000000 -0400
@@ -22410,7 +22410,7 @@

     else
       # On Mac OS X, OpenGL is installed as part of the optional X11 SDK.
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_ogl_cppflags=-I$sim_ac_gl_darwin_x11/include
         sim_ac_ogl_ldflags=-L$sim_ac_gl_darwin_x11/lib
@@ -22455,7 +22455,7 @@
   darwin*)

     if test x$sim_ac_enable_darwin_x11 = xtrue; then
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_gl_cppflags=-I$sim_ac_gl_darwin_x11/include
       fi
@@ -22878,7 +22878,7 @@
   darwin*)

     if test x$sim_ac_enable_darwin_x11 = xtrue; then
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_gl_cppflags=-I$sim_ac_gl_darwin_x11/include
       fi
@@ -23628,7 +23628,7 @@
   darwin*)

     if test x$sim_ac_enable_darwin_x11 = xtrue; then
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_gl_cppflags=-I$sim_ac_gl_darwin_x11/include
       fi
@@ -23865,7 +23865,7 @@
     sim_ac_coin_cppflags=`$sim_ac_coin_configcmd --cppflags`
     sim_ac_coin_cflags=`$sim_ac_coin_configcmd --cflags 2>/dev/null`
     sim_ac_coin_cxxflags=`$sim_ac_coin_configcmd --cxxflags`
-    sim_ac_coin_ldflags=`$sim_ac_coin_configcmd --ldflags`
+    sim_ac_coin_ldflags=`$sim_ac_coin_configcmd --ldflags | sed -e 's/-Wl,-framework,OpenGL/-lGL/g'`
     sim_ac_coin_libs=`$sim_ac_coin_configcmd --libs`
     sim_ac_coin_datadir=`$sim_ac_coin_configcmd --datadir`
     # Hide stderr on the following, as ``--includedir'', ``--msvcrt''
--- aclocal.m4	2004-11-16 07:03:28.000000000 -0500
+++ aclocal.m4	2026-04-29 17:36:43.000000000 -0400
@@ -8449,7 +8449,7 @@
   darwin*)
     AC_REQUIRE([SIM_AC_CHECK_X11])
     if test x$sim_ac_enable_darwin_x11 = xtrue; then
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_gl_cppflags=-I$sim_ac_gl_darwin_x11/include
       fi
@@ -8522,7 +8522,7 @@
   darwin*)
     AC_REQUIRE([SIM_AC_CHECK_X11])
     if test x$sim_ac_enable_darwin_x11 = xtrue; then
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_gl_cppflags=-I$sim_ac_gl_darwin_x11/include
       fi
@@ -8595,7 +8595,7 @@
   darwin*)
     AC_REQUIRE([SIM_AC_CHECK_X11])
     if test x$sim_ac_enable_darwin_x11 = xtrue; then
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_gl_cppflags=-I$sim_ac_gl_darwin_x11/include
       fi
@@ -8710,7 +8710,7 @@
       SIM_AC_CC_COMPILER_OPTION([-framework OpenGL], [sim_ac_use_framework_option=true])
     else
       # On Mac OS X, OpenGL is installed as part of the optional X11 SDK.
-      sim_ac_gl_darwin_x11=/usr/X11R6
+      sim_ac_gl_darwin_x11=$prefix
       if test -d $sim_ac_gl_darwin_x11; then
         sim_ac_ogl_cppflags=-I$sim_ac_gl_darwin_x11/include
         sim_ac_ogl_ldflags=-L$sim_ac_gl_darwin_x11/lib
@@ -9885,7 +9885,7 @@
     sim_ac_coin_cppflags=`$sim_ac_coin_configcmd --cppflags`
     sim_ac_coin_cflags=`$sim_ac_coin_configcmd --cflags 2>/dev/null`
     sim_ac_coin_cxxflags=`$sim_ac_coin_configcmd --cxxflags`
-    sim_ac_coin_ldflags=`$sim_ac_coin_configcmd --ldflags`
+    sim_ac_coin_ldflags=`$sim_ac_coin_configcmd --ldflags | sed -e 's/-Wl,-framework,OpenGL/-lGL/g'`
     sim_ac_coin_libs=`$sim_ac_coin_configcmd --libs`
     sim_ac_coin_datadir=`$sim_ac_coin_configcmd --datadir`
     # Hide stderr on the following, as ``--includedir'', ``--msvcrt''