diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index ffaff4420..91fd9a82d 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -350,10 +350,10 @@ if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
                 ln -sf .src/$file $file;
             done &&
             # Link source files under .src/xxx, the first child dir.
-            for dir in `(cd .src && find . -type d|grep '\./'|grep -v Linux|grep -v Darwin)`; do
+            for dir in `(cd .src && find . -maxdepth 1 -type d|grep '\./'|grep -v Linux|grep -v Darwin)`; do
                 mkdir -p $dir &&
                 for file in `(cd .src/$dir && find . -maxdepth 1 -type f ! -name '*.o' ! -name '*.d')`; do
-                    ln -sf .src/$dir/$file $dir/$file;
+                    ln -sf ../.src/$dir/$file $dir/$file;
                 done;
             done &&
             # Build source code.
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index 549179e98..81b47cdd5 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -596,10 +596,6 @@ function check_option_conflicts() {
         echo "Don't support building FFMPEG, please use docker https://github.com/ossrs/srs-docker"; exit -1;
     fi
 
-    if [[ $SRS_OSX == YES && $SRS_UTEST == YES ]]; then
-        echo "Mac does not support utest."; exit -1;
-    fi
-
     # TODO: FIXME: check more os.
 
     __check_ok=YES
diff --git a/trunk/auto/setup_variables.sh b/trunk/auto/setup_variables.sh
index c144c68f5..7a39fd166 100755
--- a/trunk/auto/setup_variables.sh
+++ b/trunk/auto/setup_variables.sh
@@ -13,7 +13,7 @@ echo "SRS_WORKDIR: ${SRS_WORKDIR}, SRS_OBJS_DIR: ${SRS_OBJS_DIR}, SRS_OBJS: ${SR
 # For src object files on each platform.
 (
     mkdir -p ${SRS_OBJS_DIR} && cd ${SRS_OBJS_DIR} &&
-    rm -rf src utest srs research include lib srs_hls_ingester srs_mp4_parser &&
+    rm -rf src utest srs srs_utest research include lib srs_hls_ingester srs_mp4_parser &&
     mkdir -p ${SRS_PLATFORM}/src && ln -sf ${SRS_PLATFORM}/src &&
     mkdir -p ${SRS_PLATFORM}/utest && ln -sf ${SRS_PLATFORM}/utest &&
     mkdir -p ${SRS_PLATFORM}/research && ln -sf ${SRS_PLATFORM}/research &&
diff --git a/trunk/auto/utest.sh b/trunk/auto/utest.sh
index 003e3360b..27bfe0693 100755
--- a/trunk/auto/utest.sh
+++ b/trunk/auto/utest.sh
@@ -20,9 +20,6 @@ SRS_TRUNK_PREFIX=../../..
 # gest dir, relative to objs/utest, it's trunk/objs/gtest
 GTEST_DIR=${SRS_TRUNK_PREFIX}/${SRS_OBJS_DIR}/gtest
 
-# the extra defines to compile utest.
-EXTRA_DEFINES=""
-
 cat << END > ${FILE}
 # user must run make the ${SRS_OBJS_DIR}/utest dir
 # at the same dir of Makefile.
diff --git a/trunk/configure b/trunk/configure
index 880a89aef..90a85ea94 100755
--- a/trunk/configure
+++ b/trunk/configure
@@ -393,6 +393,11 @@ if [ $SRS_LIBRTMP = YES ]; then
     MODULE_OBJS="${CORE_OBJS[@]} ${KERNEL_OBJS[@]} ${PROTOCOL_OBJS[@]} ${LIBS_OBJS[@]}"
     BUILD_KEY="librtmp" LIB_NAME="lib/srs_librtmp" . auto/libs.sh
 fi
+# For utest on mac.
+# @see https://github.com/protocolbuffers/protobuf/issues/51#issuecomment-111044468
+if [[ $SRS_OSX == YES ]]; then
+    EXTRA_DEFINES="-DGTEST_USE_OWN_TR1_TUPLE=1"
+fi
 #
 # utest, the unit-test cases of srs, base on gtest1.6
 if [ $SRS_UTEST = YES ]; then