--- qt-everywhere-opensource-src-5.9.7/qtbase/mkspecs/macx-clang/qmake.conf	2018-10-16 04:37:05.000000000 -0400
+++ qt-everywhere-opensource-src-5.9.7-new/qtbase/mkspecs/macx-clang/qmake.conf	2019-02-23 14:02:01.000000000 -0500
@@ -2,7 +2,7 @@
 # qmake configuration for Clang on OS X
 #
 
-QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.10
+QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.9
 
 QMAKE_APPLE_DEVICE_ARCHS = x86_64