diff --git a/README.md b/README.md
index d2f5782..07e82cf 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,23 @@
 ## Beginner Quickstart
+
 If you simply want to run the application or use the visual interface to edit content, use the following to get started:
 
-*On windows:*
+_On windows:_
+
 - Double click `setup-windows.bat` in the base folder for the project
 - Enter the `DATA_ENDPOINT` and `NEXT_PUBLIC_MAPBOX_TOKEN` provided from the project team. For non-affiliated users, see data requirements below.
 - Open your web browser and navigate to `localhost:3000` to view the website, and `localhost:3000/admin/index.html` for the content editor.
 
-*On macos:* 
+_On macos:_
+
 - Open the terminal and navigate to the project. You may want to use Github Desktop, then clicked "Repository" > "Open in Terminal"
 - Run the following command in the terminal:
+
 ```
 chmod a+x setup-macos.command
 ```
-- Double click `setup-macos.command`
+
+- Double click `setup-macos.command`. The first time you run the set up script, you may receive an error that the app/script is from an unknown or unidentified developer. To run it anyways, control-click and choose "Open" from the shortcut menu -- you'll see an additional option to run it and in the future you can simply double click it.
 - Enter the `DATA_ENDPOINT` and `NEXT_PUBLIC_MAPBOX_TOKEN` provided from the project team. For non-affiliated users, see data requirements below.
 - Open your web browser and navigate to `localhost:3000` to view the website, and `localhost:3000/admin/index.html` for the content editor.
 
diff --git a/setup-macos.sh b/setup-macos.command
similarity index 100%
rename from setup-macos.sh
rename to setup-macos.command