diff --git a/Patches/Qt/5.11.2/Patch.cmake b/Patches/Qt/5.11.2/Patch.cmake
index ade6308b..5cf5764f 100644
--- a/Patches/Qt/5.11.2/Patch.cmake
+++ b/Patches/Qt/5.11.2/Patch.cmake
@@ -32,3 +32,13 @@ endif()
 file(COPY ${Qt_patch}/qtbase/src/corelib/tools/qbytearraymatcher.h
   DESTINATION ${Qt_source}/qtbase/src/corelib/tools/
   )
+
+# Fix a build issues on Mac.
+# Can't use futimens on MacOS < 10.3 which is controlled by
+# the QMAKE_MACOSX_DEPLOYMENT_TARGET value in qmake.conf
+# not by the actual system version.
+if (APPLE)
+  file(COPY ${Qt_patch}/qtbase/mkspecs/macx-clang/qmake.conf
+    DESTINATION ${Qt_source}/qtbase/mkspecs/macx-clang/
+    )
+endif()
diff --git a/Patches/Qt/5.11.2/qtbase/mkspecs/macx-clang/qmake.conf b/Patches/Qt/5.11.2/qtbase/mkspecs/macx-clang/qmake.conf
new file mode 100644
index 00000000..bc27985f
--- /dev/null
+++ b/Patches/Qt/5.11.2/qtbase/mkspecs/macx-clang/qmake.conf
@@ -0,0 +1,36 @@
+#
+# qmake configuration for Clang on OS X
+#
+
+QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.13
+
+QMAKE_APPLE_DEVICE_ARCHS = x86_64
+
+# Opt-in xcb QPA support with XQuartz:
+#
+# configure \
+#   -pkg-config \
+#   -fontconfig -system-freetype \
+#   -system-xcb -no-opengl
+#
+# Ensure that pkg-config is properly configured, or that
+#   PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig:/opt/X11/share/pkgconfig
+# is set in your build environment.
+#
+# If you don't want to use pkg-config, you can add:
+#   -L/opt/X11/lib -I/opt/X11/include
+# to the configure options.
+#
+# Due to irreconcilable differences between Cocoa
+# and X11, OpenGL is currently not supported.
+
+QMAKE_LIBS_X11 = -lX11 -lXext -lm
+QMAKE_LIBDIR_X11 = /opt/X11/lib
+QMAKE_INCDIR_X11 = /opt/X11/include
+
+include(../common/macx.conf)
+include(../common/gcc-base-mac.conf)
+include(../common/clang.conf)
+include(../common/clang-mac.conf)
+
+load(qt_config)