Update readme

Author: rhpvorderman

README.rst

@@ -48,23 +48,20 @@ Installation
 Installation with pip
 .....................
 
-+ Linux: ``pip install isal``. Wheels are provided, so installation should
++ Linux and MacOS: ``pip install isal``. Wheels are provided, so installation should
   be almost instantaneous.
-+ MacOS: make sure ``gcc``, ``yasm``, ``automake`` and ``autoconf`` packages
-  are installed. These can be installed via `Homebrew <https://brew.sh/>`_ with
-  ``brew install gcc yasm automake autoconf``. Then proceed with ``pip
-  install isal``. The package will be build on your computer.
 + Windows: Installation is not supported yet.
 
-The installation will include a staticallly linked version of isa-l. On Linux,
-wheels are provided. If a wheel is not provided for your system the
+The installation will include a staticallly linked version of isa-l. On Linux
+and MacOS, wheels are provided. If a wheel is not provided for your system the
 installation will build ISA-L first in a temporary directory. Please check the
 `ISA-L homepage <https://github.com/intel/isa-l>`_ for the build requirements.
 
 The latest development version of python-isal can be installed with::
 
     pip install git+https://github.com/rhpvorderman/python-isal.git
 
+This requires having the build requirements installed.
 If you wish to link
 dynamically against a version of libisal installed on your system use::