diff --git a/build/gyp.mozbuild b/build/gyp.mozbuild
index 83b85d43baf0..a78289b0c448 100644
--- a/build/gyp.mozbuild
+++ b/build/gyp.mozbuild
@@ -16,8 +16,8 @@ gyp_vars.update({
     'build_with_mozilla': 1,
     'build_with_chromium': 0,
     # 10.9 once we move to TC cross-compiles - bug 1270217
-    'mac_sdk_min': '10.7',
-    'mac_deployment_target': '10.7',
+    'mac_sdk_min': '10.9',
+    'mac_deployment_target': '10.9',
     'use_official_google_api_keys': 0,
     'have_clock_monotonic': 1 if CONFIG['HAVE_CLOCK_MONOTONIC'] else 0,
     'have_ethtool_cmd_speed_hi': 1 if CONFIG['MOZ_WEBRTC_HAVE_ETHTOOL_SPEED_HI'] else 0,
diff --git a/build/moz.configure/toolchain.configure b/build/moz.configure/toolchain.configure
index db48969ae44c..126a15509502 100755
--- a/build/moz.configure/toolchain.configure
+++ b/build/moz.configure/toolchain.configure
@@ -144,7 +144,7 @@ include('android-ndk.configure', when=compiling_android)
 # This needs to happen before any compilation test is done.
 
 option('--enable-macos-target', env='MACOSX_DEPLOYMENT_TARGET', nargs=1,
-       default='10.7', help='Set the minimum MacOS version needed at runtime')
+       default='10.9', help='Set the minimum MacOS version needed at runtime')
 
 
 @depends('--enable-macos-target', target)
diff --git a/old-configure.in b/old-configure.in
index 529a0793de0d..3c26d5045fee 100644
--- a/old-configure.in
+++ b/old-configure.in
@@ -2380,7 +2380,7 @@ if test -n "$MOZ_APPLEMEDIA"; then
   LDFLAGS="$LDFLAGS -framework AudioToolbox"
   dnl Verify CoreMedia is available.
   AC_CHECK_HEADER([CoreMedia/CoreMedia.h], [],
-    [AC_MSG_ERROR([MacOS X 10.7 SDK or later is required])])
+    [AC_MSG_ERROR([MacOS X 10.9 SDK or later is required])])
 fi
 fi # COMPILE_ENVIRONMENT