forward port docs from Garden

Signed-off-by: Mabel Zhang <[email protected]>

harmonic/install_osx_src.md

@@ -92,7 +92,7 @@ brew install assimp boost bullet cmake cppzmq [email protected] doxygen eigen fcl f
 ```
 
 `[email protected]` and `qt@5` are not sym-linked. To use those dependencies when building
-`gz-physics6` and `gz-gui8`, run the following after installation:
+`gz-physics7` and `gz-gui8`, run the following after installation:
 
 For Macs with Intel processors, add them to `/usr/local`:
 
@@ -105,7 +105,7 @@ export PKG_CONFIG_PATH=${PKG_CONFIG_PATH}:/usr/local/opt/[email protected]/lib/pkgc
 export CMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}:/usr/local/opt/qt@5
 ```
 
-Note if you are on an ARM based Apple Silicon Mac machine, you will need to add them to /opt/homebrew instead:
+Note if you are on an ARM based Apple Silicon Mac machine, you will need to add them to `/opt/homebrew` instead:
 
 ```bash
 # [email protected]

harmonic/troubleshooting.md

@@ -158,9 +158,9 @@ https://github.com/osrf/ogre-2.3-release
 You should be able to use Ogre 1 without any issues however. You can check if
 that's working by running a world which uses Ogre 1 instead of Ogre 2, such as:
 
-    ign gazebo -v 3 lights.sdf
+    gz sim -v 3 lights.sdf
 
-If that loads, you can continue to use Ignition with Ogre 1, just use the
+If that loads, you can continue to use Gazebo with Ogre 1, just use the
 `--render-engine ogre` option.
 
 ## Windows