diff --git a/nativeLib/gridslice/src/build_osx.sh b/nativeLib/gridslice/src/build_osx.sh
new file mode 100755
index 0000000000..902fe3135b
--- /dev/null
+++ b/nativeLib/gridslice/src/build_osx.sh
@@ -0,0 +1,11 @@
+#!/bin/bash -fv
+#
+# build_osx.sh: Build gridslice library for macOS
+# author: mjames@ucar
+#
+export C_INCLUDE_PATH=/System/Library/Frameworks/Python.framework/Headers
+export CFLAGS="-I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/ -I /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/include $CFLAGS"
+gcc -c -fPIC $CFLAGS gridslice.c -o gridslice.o
+gcc -c -fPIC $CFLAGS sliceConvert.c -o sliceConvert.o
+gcc gridslice.o sliceConvert.o -lpython -shared -o gridslice.so
+# cp gridslice.so /Library/Python/2.7/site-packages/
diff --git a/nativeLib/gridslice/src/gridslice.c b/nativeLib/gridslice/src/gridslice.c
index 247c97ff20..a281967084 100644
--- a/nativeLib/gridslice/src/gridslice.c
+++ b/nativeLib/gridslice/src/gridslice.c
@@ -1,23 +1,3 @@
-/*****************************************************************************************
- * COPYRIGHT (c), 2009, RAYTHEON COMPANY
- * ALL RIGHTS RESERVED, An Unpublished Work
- *
- * RAYTHEON PROPRIETARY
- * If the end user is not the U.S. Government or any agency thereof, use
- * or disclosure of data contained in this source code file is subject to
- * the proprietary restrictions set forth in the Master Rights File.
- *
- * U.S. GOVERNMENT PURPOSE RIGHTS NOTICE
- * If the end user is the U.S. Government or any agency thereof, this source
- * code is provided to the U.S. Government with Government Purpose Rights.
- * Use or disclosure of data contained in this source code file is subject to
- * the "Government Purpose Rights" restriction in the Master Rights File.
- *
- * U.S. EXPORT CONTROLLED TECHNICAL DATA
- * Use or disclosure of data contained in this source code file is subject to
- * the export restrictions set forth in the Master Rights File.
- ******************************************************************************************/
-
 /*
  * Python module that utilizes the AWIPSI sliceConvert functions to offer
  * slicing capability to numpy arrays.
diff --git a/nativeLib/gridslice/src/gridslice.so b/nativeLib/gridslice/src/gridslice.so
new file mode 100755
index 0000000000..2581ba09e0
Binary files /dev/null and b/nativeLib/gridslice/src/gridslice.so differ