diff --git a/src/libext/mpich/build_mpich.sh b/src/libext/mpich/build_mpich.sh
index 7272798100..125b702c3f 100755
--- a/src/libext/mpich/build_mpich.sh
+++ b/src/libext/mpich/build_mpich.sh
@@ -52,7 +52,13 @@ if [ -x "$(command -v xx-info)" ]; then
     fi
 fi
 echo SHARED_FLAGS is $SHARED_FLAGS
-./configure --prefix=`pwd`/../.. --enable-fortran=all $SHARED_FLAGS  --disable-cxx --enable-romio --disable-cuda --disable-opencl --enable-silent-rules  --enable-fortran=all
+if [ $(uname -s) == "Darwin" ]; then
+    if pkg-config hwloc --exists; then
+	HWLOC_FLAGS=" --with-hwloc=$(pkg-config hwloc  --variable=prefix) "
+    fi
+fi
+echo HWLOC_FLAGS is $HWLOC_FLAGS
+./configure --prefix=`pwd`/../.. --enable-fortran=all $SHARED_FLAGS  --disable-cxx --enable-romio  --enable-silent-rules  --enable-fortran=all $HWLOC_FLAGS
 #./configure --prefix=`pwd`/../.. --enable-fortran=all $SHARED_FLAGS  --disable-cxx --enable-romio --with-pm=gforker --with-device=ch3:nemesis --disable-cuda --disable-opencl --enable-silent-rules  --enable-fortran=all
 if [[ "$?" != "0" ]]; then
     cat config.log
diff --git a/travis/build_env.sh b/travis/build_env.sh
index 52262a9db4..d9af746ff9 100755
--- a/travis/build_env.sh
+++ b/travis/build_env.sh
@@ -49,7 +49,7 @@ fi
 	    else
 		MPI_FORMULA="$MPI_IMPL"
 	    fi
-     HOMEBREW_NO_INSTALL_CLEANUP=1  HOMEBREW_NO_AUTO_UPDATE=1 brew reinstall gcc $MPI_FORMULA gsed grep automake autoconf ||true
+     HOMEBREW_NO_INSTALL_CLEANUP=1  HOMEBREW_NO_AUTO_UPDATE=1 brew reinstall gcc $MPI_FORMULA gsed grep automake autoconf hwloc ||true
      if [[ "$FC" != "gfortran" ]] && [[ "$FC" == "gfortran*" ]]; then
 	 #install non default gfortran, ie gfortran-9
 	 #get version