Added step-by-step running instructions for OS X

README.md

@@ -7,3 +7,16 @@ This is a hunt the wumpus clone with each of the caverns implemented as function
 Once you have determined which chamber the wumpus is in, call the `shoot` function with the symbol of the chamber the wumpus is in.
 
 The game is played in IRB. Execute `./wumpus` in the directory to clear the screen and play the game.
+
+Step-by-Step Execution Instructions
+-----------------------------------
+
+Running Mac OS X, open up your terminal (**Macintosh HD** → **Applications** → **Utilities** → **Terminal**). Type in 
+
+    cd ~/Downloads/Hunt-the-Wumpus
+
+and press enter (assuming you downloaded this to your downloads folder). Type in 
+
+./wumpus
+
+and you should be running the app.