manual: expand information on macOS installation

doc/manual/source/installation-and-configuration.rst

@@ -100,15 +100,8 @@ Debian, Ubuntu and Linux Mint).
 On macOS
 --------
 
-With MATLAB
-^^^^^^^^^^^
+.. warning::
 
-To install Dynare for use with MATLAB, execute the automated installer called
-``dynare-x.y-arch.pkg`` (where *x.y* is the version number and *arch* is either arm64 for Apple Silicon or x86_64 for Intel architectures),
-and follow the instructions.
-This installation does not require administrative privileges.
-If for some reason admin rights are requested, use *Change Install Location* and select *Install for me only*.
-The default installation directory is ``/Applications/Dynare/x.y-arch``.
    Installing into ``/Applications/dynare`` might fail if you have older versions of Dynare already installed in ``/Applications/Dynare``.
    To fix this, modify the ownership by executing the following command in Terminal.app::
 
@@ -119,6 +112,16 @@ After installation, the folder will contain several sub-directories, among which
    Several versions of Dynare can coexist (by default in ``/Applications/Dynare``),
    as long as you correctly adjust your path settings (see :ref:`words-warning`).
 
+With MATLAB
+^^^^^^^^^^^
+
+To install Dynare for use with MATLAB, execute the automated installer called
+``dynare-x.y-arch.pkg`` (where *x.y* is the version number and *arch* is either arm64 for Apple Silicon or x86_64 for Intel architectures),
+and follow the instructions.
+This installation does not require administrative privileges.
+If for some reason admin rights are requested, use *Change Install Location* and select *Install for me only*.
+The default installation directory is ``/Applications/Dynare/x.y-arch``.
+
 It is recommended to install the Xcode Command Line Tools (this is an Apple product)
 and GCC via Homebrew_ (see :ref:`prerequisites-macos`).
 
@@ -142,6 +145,8 @@ once)::
 
   octave:1> pkg install -forge io statistics control struct optim
 
+If you want to use the `x13` functionality of `dseries`, you also need to build the `x13as` binary. [#fx13]_
+
 On FreeBSD
 ----------
 
@@ -334,3 +339,8 @@ Dynare unusable.
 .. _Dynare wiki: https://git.dynare.org/Dynare/dynare/wikis
 .. _Octave-Forge: https://octave.sourceforge.io/
 .. _Homebrew: https://brew.sh
+
+
+.. rubric:: Footnotes
+
+.. [#fx13] See the instructions at `<https://forum.dynare.org/t/missing-installation-package/27350/4>`__.
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