Fix readme file

README.md

@@ -4,78 +4,108 @@ This is a personal collection of shell scripts to easily develop and test severa
 
 ## Install
 
-Checkout the project in `$HOME/pgsql`
+Checkout the project in ```$HOME/pgsql```
 
+```bash
     git clone https://github.com/mnencia/pgenv.git $HOME/pgsql
+```
 
-Add the following lines to `~/.bashrc`
-
+Add the following lines to ```~/.bashrc```
 
+```bash
     # pgenv
     if [ -r "$HOME/pgsql/pgenv.sh" ] ; then
         . "$HOME/pgsql/pgenv.sh"
     fi
+```
 
 Reload the current shell
 
+```bash
     exec bash
+```
 
 ## Install master version (required)
 
 Initial postgresql checkout
 
+```bash
     git clone git://git.postgresql.org/git/postgresql.git $HOME/pgsql/master
+```
 
 In Ubuntu, install these packages, which are necessary for configure-all.sh
 
+```bash
     sudo apt-get install tcl-dev libssl-dev build-essential bison flex \
-        libreadline-dev libxml2-dev
+    libreadline-dev libxml2-dev
+```
 
 If you use openSUSE, you must install these packages:
 
-    sudo zypper in -t pattern devel_C_C++
+```bash
+    sudo zypper in -t pattern devel_C_C++ 
     sudo zypper in tcl-devel libxml2-devel readline-devel libopenssl-devel
+```
 
 If you use Archlinux, please be sure that these packages are installed:
 
+```bash
     sudo pacman -S tcl libxml2 openssl bison flex base-devel
+```
+
+If you use Mac Os, install the following packages using brew:
+
+```bash
+    brew install openssl libxml2 readline 
+```
 
 Build and install the development head version
 
+
+```bash
     cd ~/pgsql
     ./configure-all.sh master
     ./install-all.sh master
+```
 
 ## Install a stable version (optional)
 
 Add a $VERSION checkout (e.g. 9.4, 9.3, etc...)
 
+```bash
     cd ~/pgsql
     ./new-branch.sh $VERSION
+```
 
 Build and install the $VERSION version
 
+```bash
     cd ~/pgsql
     ./configure-all.sh $VERSION
     ./install-all.sh $VERSION
+```
 
 # Upgrade an existing installation
 
 Upgrade all the installed versions
 
+```bash
     cd ~/pgsql
     ./pull-all.sh
     ./clean-all.sh
     ./configure-all.sh
     ./install-all.sh
+```
 
 Upgrade only one version (numeric version or master)
 
+```bash
     cd ~/pgsql
     ./pull-all.sh
     ./clean-all.sh $VERSION
     ./configure-all.sh $VERSION
     ./install-all.sh $VERSION
+```
 
 ## Usage