diff --git a/install_osx_user.sh b/install_osx_user.sh
index c546a6ca..cef1f3cc 100644
--- a/install_osx_user.sh
+++ b/install_osx_user.sh
@@ -1,25 +1,60 @@
 #!/bin/bash
+
+# This script will build python3-sipsimple and its command line tools on MacOS
+# https://github.com/AGProjects/python3-sipsimple
+
+# Last tested on MacOS Ventura 13.6.7, Xcode 14.3.1 and Python 3.9
+#
+# Install Xcode from Apple
+# Install MacPorts from https://www.macports.org
+# Install python 3.9 from https://www.python.org/ftp/python/3.9.12/python-3.9.12-macosx10.9.pkg
+#
+# Then run this script to install the packages in ~/Library/Python/3.9/lib/python/site-packages/
+
+# Install C building dependencies
 sudo port install darcs yasm x264 gnutls openssl sqlite3 gnutls ffmpeg mpfr libmpc libvpx
 
-pip3 install --user cython==0.29.37 dnspython lxml twisted python-dateutil greenlet zope.interface requests gmpy2 wheel gevent
+# Install Python building dependencies
 
-./get_dependencies.sh 
+pip3 install --user cython==0.29.37 dnspython lxml twisted python-dateutil greenlet \
+zope.interface requests gmpy2 wheel gevent
 
-cd ..
+# Create a work directory
+
+if [ ! -d work ]; then
+    mkdir work
+fi
+
+cd work
+
+# Download and build SIP SIMPLE client SDK built-in dependencies
 for p in python3-application python3-eventlib python3-gnutls python3-otr python3-msrplib python3-xcaplib; do
     if [ ! -d $p ]; then
        darcs clone http://devel.ag-projects.com/repositories/$p
     fi
     cd $p
     pip3 install --user .
     cd ..
 done
 
+# Download and build SIP SIMPLE client SDK
+if [ ! -d python3-sipsimple ]; then
+    darcs clone http://devel.ag-projects.com/repositories/python3-sipsimple
+fi
+
 cd python3-sipsimple
+./get_dependencies.sh 
 pip3 install --user .
 cd ..
 
+# Download nand install SIP command line tools
+if [ ! -d sipclients3 ]; then
+    darcs clone http://devel.ag-projects.com/repositories/sipclients3
+fi
+
 cd sipclients3
 pip3 install --user .
 cd ..
 
+# The binaries starting with sip- prefix have been installed in ~/Library/Python/3.9/bin
+# See more notes inside docs/ folder