Updated Working on macOS (markdown)

Working-on-macOS.md

@@ -178,11 +178,11 @@ Here's a 32 megabyte dmg:
 ```
 hdiutil create -size 32m -fs HFS+ -volname "My App" my_app_writeable.dmg
 ```
-2. This should tell you something like `/dev/disk3` or something. Make a note of that, you'll need it.
+2. Attach `my_app_writeable.dmg`. This should tell you something like `/dev/disk3` or something. Make a note of that, you'll need it for the next step.
 ```
 hdiutil attach my_app_writeable.dmg
 ```
-3. Drag your app into the dmg. Then run this, replacing `disk999` with whatever `/dev/disk` was specified.
+3. Drag your app into the dmg. Then run this, replacing `disk999` with whatever `/dev/disk` was specified in the previous step.
 ```
 hdiutil detach /dev/disk999
 ```
@@ -190,4 +190,4 @@ hdiutil detach /dev/disk999
 ```
 hdiutil convert my_app_writeable.dmg -format UDZO -o my_app.dmg
 ```
-5. There you go. `my_app.dmg` is ready to be sent to all your most trusted game critics.
+5. Share it. Congratulations, `my_app.dmg` is ready to be sent to all your most trusted game critics.