DOCSP-405: Rearrange MacOS installation instructions

Author: i80and

source/includes/steps-install-mongodb-on-linux.yaml

@@ -4,7 +4,7 @@ title: Download the binary files for the desired release of MongoDB.
 stepnum: 1
 ref: download
 pre: |
-  Download the binaries from ``https://www.mongodb.org/downloads``.
+  Download the binaries from ``https://www.mongodb.com/download-center``.
 ---
 # When borrowing this step, you must include an action with a command.
 title: Extract the files from the downloaded archive.

source/tutorial/install-mongodb-on-os-x.txt

@@ -20,17 +20,19 @@ Use this tutorial to install MongoDB Community Edition on OS X systems.
    Starting in version 3.0, MongoDB only supports OS X versions 10.7 (Lion)
    and later on Intel x86-64.
 
-MongoDB Community Edition is available through the popular OS X package manager
-`Homebrew <http://brew.sh/>`_ or through the `MongoDB Download site
-<http://www.mongodb.org/downloads>`_.
+You may download MongoDB Community Edition through either the `MongoDB
+Download site <https://www.mongodb.com/download-center>`_ or the
+popular OS X package manager `Homebrew <http://brew.sh/>`_.
 
 Install MongoDB Community Edition
 ---------------------------------
 
 .. include:: /includes/extracts/install-past-mongodb-org-osx.rst
 
-You can install MongoDB Community Edition with `Homebrew <http://brew.sh/>`_ or
-manually. This section describes both methods.
+Install MongoDB Community Edition Manually
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. include:: /includes/steps/install-mongodb-on-osx-manually.rst
 
 .. _install-with-homebrew:
 
@@ -44,14 +46,6 @@ setup and configuration, which is beyond the scope of this document.
 
 .. include:: /includes/steps/install-mongodb-on-osx-with-homebrew.rst
 
-Install MongoDB Community Edition Manually
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Only install MongoDB Community Edition using this procedure if you cannot use
-:ref:`homebrew <install-with-homebrew>`.
-
-.. include:: /includes/steps/install-mongodb-on-osx-manually.rst
-
 Run MongoDB
 -----------