diff --git a/scripts/build.sh b/scripts/build.sh
index 52e30c0c9..133c483f2 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -147,6 +147,8 @@ fi
 if [ "$PLATFORM" = Darwin ] ; then
 	if [ -d /Developer/SDKs ] ; then
 		SDKROOT=/Developer/SDKs
+	elif [ -d  /Library/Developer/CommandLineTools/SDKs ] ; then
+		SDKROOT=/Library/Developer/CommandLineTools/SDKs
 	elif [ -d /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs ] ; then
 		SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs
 	else
@@ -154,10 +156,20 @@ if [ "$PLATFORM" = Darwin ] ; then
 		echo "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs)"
 		exit 1;
 	fi
+	# find a 10.x base SDK to use, or if none can be found, find a numbered 11.x base SDK to use
 	BASESDK=$(ls $SDKROOT | grep "MacOSX10\.1.\.sdk" | head -1 | sed -e "s/MacOSX//;s/\.sdk//")
-	OLDER_MAC="-mmacosx-version-min=10.11 -isysroot${SDKROOT}/MacOSX${BASESDK}.sdk"
+	if [ -z "$BASESDK" ] ; then
+	  BASESDK=$(ls $SDKROOT | grep -E "MacOSX11\.[0-9]+\.sdk" | head -1 | sed -e "s/MacOSX//;s/\.sdk//")
+	  if [ -z "$BASESDK" ] ; then
+	    echo "Cannot find a base SDK of type 10.x or 11.x under the SDK root of ${SDKROOT}"
+	    exit 1;
+    fi
+  fi
+  echo "Using ${BASESDK} as the BASESDK under ${SDKROOT}"
+
+	OLDER_MAC="-mmacosx-version-min=${BASESDK} -isysroot${SDKROOT}/MacOSX${BASESDK}.sdk"
 	OLDER_MAC_CMAKE="-DCMAKE_OSX_DEPLOYMENT_TARGET=${BASESDK} -DCMAKE_OSX_SYSROOT=${SDKROOT}/MacOSX${BASESDK}.sdk/"
-	if [[ ! -d /usr/include && ! -d "${SDKROOT}/MacOSX.sdk/usr/include" ]] ; then
+	if [[ ! -d /usr/include && ! -d "${SDKROOT}/MacOSX${BASESDK}.sdk/usr/include" ]] ; then
 		echo "Error: Xcode Command Line Tools are not installed"
 		echo ""
 		echo "Please run:"