diff --git a/README.wavsim b/README.wavsim
index b5a023d2f..097f4e924 100644
--- a/README.wavsim
+++ b/README.wavsim
@@ -21,6 +21,9 @@ http://gareus.org/oss/spicesound/start
 
 Example files are available at \examples\wave
 
-Tests on Linux and macOS will follow.
-
-
+Compiling for macOS M2 requires installing libsndfile and libsamplerate from Homebrew.
+compile_macos_clang_M2.sh has been enhanced by adding
+-I/opt/homebrew/opt/libsndfile/include -I/opt/homebrew/opt/libsamplerate/include
+to CFLAGS and
+-L/opt/homebrew/opt/libsndfile/lib -L/opt/homebrew/opt/libsamplerate/lib
+to LDFLAGS
diff --git a/compile_macos_clang_M2.sh b/compile_macos_clang_M2.sh
index e5423ded7..67f185b34 100644
--- a/compile_macos_clang_M2.sh
+++ b/compile_macos_clang_M2.sh
@@ -47,13 +47,13 @@ if test "$1" = "d"; then
 # Builtin readline is not compatible (Big Sur), readline via Homebrew required (in /opt/homebrew/opt)
 # Standard clang does not support OpenMP, uses https://mac.r-project.org/openmp/
 
-  ../configure --with-x --enable-cider --with-readline=/opt/homebrew/opt/readline --enable-debug CFLAGS="-m64 -O0 -g -Wall -I/opt/X11/include/freetype2 -I/opt/homebrew/opt/readline/include" LDFLAGS="-m64 -g -L/opt/homebrew/opt/readline/lib -L/opt/X11/lib -L/usr/local/lib -lomp"
+  ../configure --with-x --enable-cider --with-readline=/opt/homebrew/opt/readline --enable-debug CFLAGS="-m64 -O0 -g -Wall -I/opt/X11/include/freetype2 -I/opt/homebrew/opt/readline/include -I/opt/homebrew/opt/libsndfile/include -I/opt/homebrew/opt/libsamplerate/include" LDFLAGS="-m64 -g -L/opt/homebrew/opt/readline/lib -L/opt/homebrew/opt/libsndfile/lib -L/opt/homebrew/opt/libsamplerate/lib -L/opt/X11/lib -L/usr/local/lib -lomp"
 else
    cd release
    if [ $? -ne 0 ]; then  echo "cd release failed"; exit 1 ; fi
   echo "configuring for 64 bit release"
   echo
-  ../configure --with-x --enable-cider --with-readline=/opt/homebrew/opt/readline CFLAGS="-m64 -O2 -I/opt/X11/include/freetype2 -I/opt/homebrew/opt/readline/include -I/opt/homebrew/opt/ncurses/include" LDFLAGS="-m64 -L/opt/homebrew/opt/readline/lib -L/opt/homebrew/opt/ncurses/lib -L/opt/X11/lib -L/usr/local/lib -lomp"
+  ../configure --with-x --enable-cider --with-readline=/opt/homebrew/opt/readline --enable-predictor CFLAGS=" -march=native -m64 -O2 -I/opt/X11/include/freetype2 -I/opt/homebrew/opt/readline/include -I/opt/homebrew/opt/ncurses/include -I/opt/homebrew/opt/libsndfile/include -I/opt/homebrew/opt/libsamplerate/include" LDFLAGS="-m64 -L/opt/homebrew/opt/readline/lib -L/opt/homebrew/opt/ncurses/lib  -L/opt/homebrew/opt/libsndfile/lib -L/opt/homebrew/opt/libsamplerate/lib -L/opt/X11/lib -L/usr/local/lib -lomp"
 fi
 if [ $? -ne 0 ]; then  echo "../configure failed"; exit 1 ; fi