diff -urN qtwebengine.orig/mkspecs/features/functions.prf qtwebengine/mkspecs/features/functions.prf
--- qtwebengine.orig/mkspecs/features/functions.prf	2018-02-13 12:04:11.000000000 +0000
+++ qtwebengine/mkspecs/features/functions.prf	2018-02-13 12:17:37.000000000 +0000
@@ -46,14 +46,14 @@
         skipBuild("Qt WebEngine on macOS requires Clang.")
         return(false)
     }
-    # We require OS X 10.0 (darwin version 14.0.0) or newer
+    # We require OS X 10.9 (darwin version 13.0.0) or newer
     darwin_major_version = $$section(QMAKE_HOST.version, ., 0, 0)
-    lessThan(darwin_major_version, 14) {
-      skipBuild("Qt WebEngine requires OS X version 10.10 or newer.")
+    lessThan(darwin_major_version, 13) {
+      skipBuild("Qt WebEngine requires OS X version 10.9 or newer.")
       return(false)
     }
-    !isMinOSXSDKVersion(10, 10): {
-      skipBuild("Qt WebEngine requires an OS X SDK version of 10.10 or newer. Current version is $${WEBENGINE_OSX_SDK_PRODUCT_VERSION}.")
+    !isMinOSXSDKVersion(10, 9): {
+      skipBuild("Qt WebEngine requires an OS X SDK version of 10.9 or newer. Current version is $${WEBENGINE_OSX_SDK_PRODUCT_VERSION}.")
       return(false)
     }
   } else {
@@ -223,7 +223,7 @@
     requested_minor = $$2
     requested_patch = $$3
     isEmpty(requested_patch): requested_patch = 0
-    WEBENGINE_OSX_SDK_PRODUCT_VERSION = $$system("/usr/bin/xcodebuild -sdk $$QMAKE_MAC_SDK -version ProductVersion 2>/dev/null")
+    WEBENGINE_OSX_SDK_PRODUCT_VERSION = $$system("xcodebuild -sdk $$QMAKE_MAC_SDK -version ProductVersion 2>/dev/null")
     export(WEBENGINE_OSX_SDK_PRODUCT_VERSION)
     isEmpty(WEBENGINE_OSX_SDK_PRODUCT_VERSION) {
         skipBuild("Could not resolve SDK product version for \'$$QMAKE_MAC_SDK\'.")
diff -urN qtwebengine.orig/src/3rdparty/chromium/build/mac_toolchain.py qtwebengine/src/3rdparty/chromium/build/mac_toolchain.py
--- qtwebengine.orig/src/3rdparty/chromium/build/mac_toolchain.py	2018-02-13 12:05:21.000000000 +0000
+++ qtwebengine/src/3rdparty/chromium/build/mac_toolchain.py	2018-02-13 12:11:09.000000000 +0000
@@ -128,7 +128,7 @@
   try:
     build_dir = os.path.join(TOOLCHAIN_BUILD_DIR, 'Contents/Developer')
     subprocess.check_call(['sudo', '/usr/bin/xcode-select', '-s', build_dir])
-    subprocess.check_call(['sudo', '/usr/bin/xcodebuild', '-license', 'accept'])
+    subprocess.check_call(['sudo', 'xcodebuild', '-license', 'accept'])
   finally:
     subprocess.check_call(['sudo', '/usr/bin/xcode-select', '-s', old_path])