Update index.mdx

Signed-off-by: Arya Gupta <arya.gupta99999@gmail.com>

Author: Arya-Gupta

content/pages/environment/index.mdx

@@ -104,7 +104,7 @@ Additional commands are found within the six menus: File, Edit, Sketch, Debug, T
   <dt>Quit</dt>
   <dd>
     Exits the Processing Environment and closes all Processing windows. (This
-    item is located in the Processing menu on Mac OS X.)
+    item is located in the Processing menu on macOS.)
   </dd>
 </dl>
 
@@ -341,7 +341,7 @@ Additional commands are found within the six menus: File, Edit, Sketch, Debug, T
 
 ## Preferences
 
-The Processing Development Environment (PDE) is highly configurable. The most common preferences can be modified in the Preferences window, located in the File menu on Windows and Linux and the Processing menu on Mac Os X. The full list of preferences is stored in the "preferences.txt" file. This file can be opened and edited directly only when Processing is not running. You can find the location of this file on your computer by reading the bottom-left corner of the Preferences window.
+The Processing Development Environment (PDE) is highly configurable. The most common preferences can be modified in the Preferences window, located in the File menu on Windows and Linux and the Processing menu on macOS. The full list of preferences is stored in the "preferences.txt" file. This file can be opened and edited directly only when Processing is not running. You can find the location of this file on your computer by reading the bottom-left corner of the Preferences window.
 
 <dl>
   <dt>Sketchbook location</dt>