Mac OS install for dummies

content/install.txt

@@ -103,21 +103,22 @@ There is a number of different package managers for bringing software
 from the Unix/Linux world to Mac OSX. Since the community is quite
 split, we provide Kwant and its dependencies both via the `MacPorts
 <http://www.macports.org>`_ and `homebrew <http://brew.sh>`_ systems.
+(For non experts MacPorts is perhaps easier to handle).
 
 Mac OSX: MacPorts
 =================
 
 MacPorts is a full-fledged package manager that recreates a whole Linux-like
-environment on your Mac. It requires little choices to be made by the user,
+environment on your Mac. Beside Kwant, MacPorts gives you access to a wealth of free softwares which you can install on your computer
+easily (using simple command line instructions). It requires little choices to be made by the user,
 and allows for the simplest way to install Kwant.
 
 In order to install Kwant, you have to
 
-1. Install a recent version of MacPorts, as explained in the
-   `installation instructions of MacPorts
-   <http://www.macports.org/install.php>`_.
-   In particular, as explained there, you will have to install also a
-   few prerequisites, namely
+1. Install a recent version of MacPorts. In order to do that, you first have to install 
+   the prerequisites described below. When this is done, you can proceed with the installation of
+   MacPorts itself, as explained in the `installation instructions of MacPorts
+   <http://www.macports.org/install.php>`_. The prerequisites are,
 
   * the Xcode developer tools (compiler suite for Mac OSX) from
     `<http://developer.apple.com/downloads>`_. You will need an Apple ID to