diff --git a/compile_macos_clang.sh b/compile_macos_clang.sh
new file mode 100644
index 000000000..a48cf4d16
--- /dev/null
+++ b/compile_macos_clang.sh
@@ -0,0 +1,86 @@
+#!/bin/bash
+# ngspice build script for macOS, release or debug version, 64 bit
+# compile_macos.sh <d>
+
+# Procedure:
+# Install gcc, bison, flex, libtool, autoconf, automake,
+# libx11 and libx11-dev (headers), libXaw and libXaw-dev, libreadline and dev
+# Declare 'compile_linux.sh' executable and start compiling with
+# './compile_macos.sh' or './compile_macos.sh d' from the ngspice directory.
+# Options:
+# --adms and --enable-adms will install extra HICUM, EKV and MEXTRAM models via the
+# adms interface. You need to download and install the *.va files via ng-adms-va.tgz
+# Please see the ngspice manual, chapt. 13, for more info on adms.
+# CIDER, XSPICE, and OpenMP may be selected at will.
+# --disable-debug will give O2 optimization (versus O0 for debug) and removes all debugging info.
+
+# ngspice as shared library:
+# Replace --with-x by --with-ngshared in line ../configure ... .
+# Add (optionally) --enable-relpath to avoid absolute paths when searching for code models.
+# It might be necessary to uncomment and run ./autogen.sh .
+
+SECONDS=0
+
+if test "$1" = "d"; then
+   if [ ! -d "debug" ]; then
+      mkdir debug
+      if [ $? -ne 0 ]; then  echo "mkdir debug failed"; exit 1 ; fi
+   fi
+else
+   if [ ! -d "release" ]; then
+      mkdir release
+      if [ $? -ne 0 ]; then  echo "mkdir release failed"; exit 1 ; fi
+   fi
+fi
+
+# If compiling sources from git, you may need to uncomment the following two lines:
+./autogen.sh
+if [ $? -ne 0 ]; then  echo "./autogen.sh failed"; exit 1 ; fi
+
+# Alternatively, if compiling sources from git, and want to add adms created devices,
+# you may need to uncomment the following two lines (and don't forget to add adms option
+# to the ../configure statement):
+#./autogen.sh --adms
+#if [ $? -ne 0 ]; then  echo "./autogen.sh failed"; exit 1 ; fi
+
+echo
+if test "$1" = "d"; then
+   cd debug
+   if [ $? -ne 0 ]; then  echo "cd debug failed"; exit 1 ; fi
+  echo "configuring for 64 bit debug"
+  echo
+# You may add  --enable-adms to the following command for adding adms generated devices
+# Builtin readline is not compatible (Big Sur), readline via Homebrew required (in /usr/local/opt)
+# Standard clang does not support OpenMP
+  ../configure --with-x --enable-xspice --enable-cider --with-readline=/usr/local/opt/readline CFLAGS="-m64 -O0 -g -Wall -I/opt/X11/include/freetype2 -I/usr/local/opt/readline/include" LDFLAGS="-m64 -g -L/usr/local/opt/readline/lib -L/opt/X11/lib"
+else
+   cd release
+   if [ $? -ne 0 ]; then  echo "cd release failed"; exit 1 ; fi
+  echo "configuring for 64 bit release"
+  echo
+# You may add  --enable-adms to the following command for adding adms generated devices
+  ../configure --with-x --enable-xspice --enable-cider --with-readline=/usr/local/opt/readline --disable-debug  CFLAGS="-m64 -O2 -I/opt/X11/include/freetype2 -I/usr/local/opt/readline/include -I/usr/local/opt/ncurses/include" LDFLAGS="-m64 -L/usr/local/opt/readline/lib -L/usr/local/opt/ncurses/lib -L/opt/X11/lib"
+fi
+if [ $? -ne 0 ]; then  echo "../configure failed"; exit 1 ; fi
+
+echo
+# make clean is required for properly making the code models
+echo "cleaning (see make_clean.log)"
+make clean 2>&1 -j8 | tee make_clean.log
+exitcode=${PIPESTATUS[0]}
+if [ $exitcode -ne 0 ]; then  echo "make clean failed"; exit 1 ; fi
+echo "compiling (see make.log)"
+make 2>&1 -j8 | tee make.log
+exitcode=${PIPESTATUS[0]}
+if [ $exitcode -ne 0 ]; then  echo "make failed"; exit 1 ; fi
+# Install to /usr/local
+echo "installing (see make_install.log)"
+make install 2>&1 | tee make_install.log
+exitcode=${PIPESTATUS[0]}
+if [ $exitcode -ne 0 ]; then  echo "make install failed"; exit 1 ; fi
+
+ELAPSED="Elapsed compile time: $(($SECONDS / 3600))hrs $((($SECONDS / 60) % 60))min $(($SECONDS % 60))sec"
+echo
+echo $ELAPSED
+echo "success"
+exit 0
diff --git a/compile_macos.sh b/compile_macos_gcc.sh
similarity index 100%
rename from compile_macos.sh
rename to compile_macos_gcc.sh