diff --git a/src/security/tpm/key-ref-osx.hpp b/src/security/tpm/key-ref-osx.hpp
new file mode 100644
index 0000000..02ed524
--- /dev/null
+++ b/src/security/tpm/key-ref-osx.hpp
@@ -0,0 +1,38 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2017 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#ifndef NDN_SECURITY_TPM_KEY_REF_OSX_HPP
+#define NDN_SECURITY_TPM_KEY_REF_OSX_HPP
+
+#include "../../util/cf-releaser-osx.hpp"
+#include <Security/Security.h>
+
+namespace ndn {
+namespace security {
+namespace tpm {
+
+using KeyRefOsx = util::CFReleaser<SecKeyRef>;
+
+} // namespace tpm
+} // namespace security
+} // namespace ndn
+
+#endif // NDN_SECURITY_TPM_KEY_REF_OSX_HPP