More accurate Mac descriptions as well as adding a missing one

_pages/en_US/installing-boot9strap-(mset9).txt

@@ -46,7 +46,7 @@ In this section, you will prepare the SD card data necessary for the MSET9 explo
 
 1. Run the MSET9 script:
     + **Windows**: Double-click `mset9.bat`
-    + **macOS**: Double-click `mset9.command`
+    + **macOS**: Double-click `mset9.command` and enter your password if prompted
     + **Linux**: open a Terminal window, `cd` to the root of your SD card, then type `python3 mset9.py` and press Enter
 
     ![Image: MSET9 setup](/images/screenshots/mset9/mset9-select.png)
@@ -82,7 +82,7 @@ These instructions must be followed **EXACTLY**, so double-check EVERYTHING you
 1. Insert your SD card into your computer
 1. Run the MSET9 script:
     + **Windows**: Double-click `mset9.bat`
-    + **macOS**: Double-click `mset9.command`
+    + **macOS**: Double-click `mset9.command` and enter your password if prompted
     + **Linux**: open a Terminal window, `cd` to the root of your SD card, then type `python3 mset9.py` and press Enter
 1. Type the number corresponding to your console model and version, then press Enter
 1. In the MSET9 window, type `2`, then press Enter to inject MSET9
@@ -108,7 +108,7 @@ Do NOT skip this section! If you skip it, applications may crash unexpectedly an
 1. Insert your SD card into your computer
 1. Run the MSET9 script:
     + **Windows**: Double-click `mset9.bat`
-    + **macOS**: Double-click `mset9.command`
+    + **macOS**: Double-click `mset9.command` and enter your password if prompted
     + **Linux**: open a Terminal window, `cd` to the root of your SD card, then type `python3 mset9.py` and press Enter
 1. Type the number corresponding to your console model and version, then press Enter
 1. In the MSET9 window, type `3`, then press Enter to remove MSET9
@@ -122,4 +122,4 @@ Did you follow Section IV (Removing MSET9)? That section is MANDATORY!
 {: .notice--danger}
 
 ### Continue to [Finalizing Setup](finalizing-setup)
-{: .notice--primary}
+{: .notice--primary}