diff --git a/oss_scripts/prepare_tf_dep.sh b/oss_scripts/prepare_tf_dep.sh
index b48301c9c..d9a8228da 100755
--- a/oss_scripts/prepare_tf_dep.sh
+++ b/oss_scripts/prepare_tf_dep.sh
@@ -7,21 +7,31 @@ elif (which python3) | grep -q "python3"; then
   installed_python="python3"
 fi
 
+ext=""
+osname="$(uname -s | tr 'A-Z' 'a-z')"
+if [[ "${osname}" == "darwin" ]]; then
+  ext='""'
+fi
+
 # update setup.nightly.py with tf version
 tf_version=$($installed_python -c 'import tensorflow as tf; print(tf.__version__)')
 echo "$tf_version"
-sed -E -i "s/project_version = 'REPLACE_ME'/project_version = '${tf_version}'/" oss_scripts/pip_package/setup.nightly.py
+sed -i $ext "s/project_version = 'REPLACE_ME'/project_version = '${tf_version}'/" oss_scripts/pip_package/setup.nightly.py
 # update __version__
-sed -E -i "s/__version__ = .*\$/__version__ = \"${tf_version}\"/" tensorflow_text/__init__.py
+sed -i $ext "s/__version__ = .*\$/__version__ = \"${tf_version}\"/" tensorflow_text/__init__.py
 
 # Get commit sha of installed tensorflow
 # For some unknown reason this now needs to be split into two commands on Windows
 short_commit_sha=$($installed_python -c 'import tensorflow as tf; print(tf.__git_version__)' | tail -1)
-short_commit_sha=$(echo $short_commit_sha | grep -oP '(?<=-g)[0-9a-f]*$')
+if [[ "${osname}" == "darwin" ]]; then
+  short_commit_sha=$(echo $short_commit_sha | perl -nle 'print $& while m{(?<=-g)[0-9a-f]*$}g')
+else
+  short_commit_sha=$(echo $short_commit_sha | grep -oP '(?<=-g)[0-9a-f]*$')
+fi
 commit_sha=$(curl -SsL https://github.com/tensorflow/tensorflow/commit/${short_commit_sha} | grep sha-block | grep commit | sed -e 's/.*\([a-f0-9]\{40\}\).*/\1/')
 
 # Update TF dependency to installed tensorflow
-sed -E -i "s/strip_prefix = \"tensorflow-2.\+\",/strip_prefix = \"tensorflow-${commit_sha}\",/" WORKSPACE
-sed -E -i "s|\"https://github.com/tensorflow/tensorflow/archive/.\+\.zip\"|\"https://github.com/tensorflow/tensorflow/archive/${commit_sha}.zip\"|" WORKSPACE
+sed -E -i $ext "s/strip_prefix = \"tensorflow-2.+\",/strip_prefix = \"tensorflow-${commit_sha}\",/" WORKSPACE
+sed -E -i $ext "s|\"https://github.com/tensorflow/tensorflow/archive/v.+\.zip\"|\"https://github.com/tensorflow/tensorflow/archive/${commit_sha}.zip\"|" WORKSPACE
 prev_shasum=$(grep -A 1 -e "strip_prefix.*tensorflow-" WORKSPACE | tail -1 | awk -F '"' '{print $2}')
-sed -i "s/sha256 = \"${prev_shasum}\",//" WORKSPACE
+sed -i $ext "s/sha256 = \"${prev_shasum}\",//" WORKSPACE