diff --git a/.gitignore b/.gitignore
index adce04e177caa7dad2a7665449f1d9f922ade717..4f6a819247b68822cda94ea099f9d51de56c3a24 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,4 +13,8 @@ build/
 docs/_build/
 *.a
 
+.vscode/
+builds/
+mace/examples/android/macelibrary/src/main/cpp/mace/
+
 \.project/
diff --git a/mace/examples/android/build.sh b/mace/examples/android/build.sh
index 9a662d9709796155d8cfe9b9829ffba00e3ecd71..1533e80695299f140fb769af93aae5f3ea2fcc06 100755
--- a/mace/examples/android/build.sh
+++ b/mace/examples/android/build.sh
@@ -5,8 +5,8 @@ set -e -u -o pipefail
 pushd ../../../
 python tools/converter.py build --config=docs/getting_started/models/demo_app_models.yaml
 
-cp -r build/mobilenet/include/ mace/examples/android/macelibrary/src/main/cpp/
-cp -r build/mobilenet/lib/ mace/examples/android/macelibrary/src/main/cpp/
+cp -r builds/mobilenet/include/ mace/examples/android/macelibrary/src/main/cpp/
+cp -r builds/mobilenet/lib/ mace/examples/android/macelibrary/src/main/cpp/
 
 popd
 
diff --git a/tools/converter.py b/tools/converter.py
index 9e7973a94ba328b63d5191ee4f739bf12dc7a76f..da590b4fde954693724459744edccaf568f21353 100644
--- a/tools/converter.py
+++ b/tools/converter.py
@@ -35,10 +35,12 @@ from common import mace_check
 from common import MaceLogger
 from common import StringFormatter
 
+
+os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2' 
 ################################
 # common definitions
 ################################
-BUILD_OUTPUT_DIR = 'build'
+BUILD_OUTPUT_DIR = 'builds'
 BUILD_DOWNLOADS_DIR = BUILD_OUTPUT_DIR + '/downloads'
 PHONE_DATA_DIR = "/data/local/tmp/mace_run"
 MODEL_OUTPUT_DIR_NAME = 'model'
diff --git a/tools/sh_commands.py b/tools/sh_commands.py
index 1a48fff077b4c1ecada1e12297a8aebf54ee9d6d..7533f77b3b2bab843f810f3f4f3424ba030e0e6a 100644
--- a/tools/sh_commands.py
+++ b/tools/sh_commands.py
@@ -25,6 +25,7 @@ import subprocess
 import sys
 import time
 import urllib
+import platform
 from enum import Enum
 
 import common
@@ -1056,10 +1057,15 @@ def merge_libs(target_soc,
 
     mri_stream += "save\n"
     mri_stream += "end\n"
-
-    cmd = sh.Command("%s/toolchains/" % os.environ["ANDROID_NDK_HOME"] +
-                     "aarch64-linux-android-4.9/prebuilt/linux-x86_64/" +
-                     "bin/aarch64-linux-android-ar")
+    which_sys = platform.system()
+    if which_sys == "Linux":
+        cmd = sh.Command("%s/toolchains/" % os.environ["ANDROID_NDK_HOME"] +
+                        "aarch64-linux-android-4.9/prebuilt/linux-x86_64/" +
+                        "bin/aarch64-linux-android-ar")
+    elif which_sys == "Darwin":
+        cmd = sh.Command("%s/toolchains/" % os.environ["ANDROID_NDK_HOME"] +
+                        "aarch64-linux-android-4.9/prebuilt/darwin-x86_64/" +
+                        "bin/aarch64-linux-android-ar")
 
     cmd("-M", _in=mri_stream)
 
@@ -1076,13 +1082,23 @@ def packaging_lib(libmace_output_dir, project_name):
 
     print("Start packaging '%s' libs into %s" % (project_name,
                                                  tar_package_path))
-    sh.tar(
-        "cvzf",
-        "%s" % tar_package_path,
-        glob.glob("%s/*" % project_dir),
-        "--exclude",
-        "%s/_tmp" % project_dir,
-        _fg=True)
+    which_sys = platform.system()
+    if which_sys == "Linux":
+        sh.tar(
+            "cvzf",
+            "%s" % tar_package_path,
+            glob.glob("%s/*" % project_dir),
+            "--exclude",
+            "%s/_tmp" % project_dir,
+            _fg=True)
+    elif which_sys == "Darwin":
+        sh.tar(
+            "--exclude",
+            "%s/_tmp" % project_dir,
+            "-cvzf",
+            "%s" % tar_package_path,
+            glob.glob("%s/*" % project_dir),
+            _fg=True)
     print("Packaging Done!\n")