Modify build documents for problems from JOSS reviewers (#3258)

* add Apple MacOS build doc

* Apply suggestions from code review

src/docs/sphinx/buildGuide/AppleMacOS.rst

@@ -0,0 +1,93 @@
+.. _AppleMacOS:
+
+Building Apple MacOS
+==============
+
+Install homebrew
+----------------
+Taken from the [homebrew website](https://brew.sh)
+.. code-block::
+
+  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+  (echo; echo 'eval "$(/opt/homebrew/bin/brew shellenv)"') >> ~/.zprofile
+  
+  note: this is the command for `zsh`. Other shells will require different commands. Homebrew should provide the correct command after install is complete.
+  eval "$(/opt/homebrew/bin/brew shellenv)"
+
+Install packages using homebrew
+-------------------------------
+
+.. code-block::
+
+  brew install bison cmake gfortran git-lfs open-mpi lapack python3 ninja m4
+  echo 'export PATH="/opt/homebrew/opt/bison/bin:$PATH"' >> ~/.zshrc
+  echo 'export PATH="/opt/homebrew/opt/m4/bin:$PATH"' >> ~/.zshrc
+  git lfs install
+
+Clone GEOS
+----------
+
+.. code-block::
+
+  git clone [email protected]:GEOS-DEV/GEOS.git
+  cd GEOS
+  git submodule init
+  git submodule update
+  cd ..
+
+Clone thirdPartyLibs
+--------------------
+
+.. code-block::
+
+  git clone [email protected]:GEOS-DEV/thirdPartyLibs.git
+  cd thirdPartyLibs
+  git submodule init 
+  git submodule update
+  git lfs pull
+
+
+Configure and build thirdPartyLibs
+---------------------------------
+
+.. code-block::
+
+  python3 scripts/config-build.py -hc ../GEOS/host-configs/apple/macOS_arm.cmake -bt Release
+
+You will get a warning you can ignore
+
+.. code-block::
+
+  CMake Warning at /Users/settgast1/Codes/geos/GEOS/host-configs/tpls.cmake:10 (message):
+    'GEOS_TPL_DIR' does not exist.
+
+
+Continue with the build
+
+.. code-block::
+
+  cd build-macOS_arm-release
+  make
+
+You will get an error at the end...you can ignore it.
+
+.. code-block::
+
+  [100%] Linking CXX executable ../../../tests/blt_mpi_smoke
+  ld: warning: -commons use_dylibs is no longer supported, using error treatment instead
+  ld: file not found: @rpath/libquadmath.0.dylib for architecture arm64
+  clang: error: linker command failed with exit code 1 (use -v to see invocation)
+  make[2]: *** [tests/blt_mpi_smoke] Error 1
+  make[1]: *** [blt/tests/smoke/CMakeFiles/blt_mpi_smoke.dir/all] Error 2
+  make: *** [all] Error 2
+
+
+Build GEOS
+----------
+
+.. code-block::
+
+  cd ../../GEOS
+  python3 scripts/config-build.py -hc host-configs/apple/macOS_arm.cmake -bt Release --ninja
+  cd build-macOS_arm-release
+  ninja geosx

src/docs/sphinx/buildGuide/Index.rst

@@ -18,3 +18,5 @@ Welcome to the GEOS build guide.
    SpackUberenv
 
    ContinuousIntegration
+
+   AppleMacOS