diff --git a/README.md b/README.md
index 6ca99cf..eda30e6 100644
--- a/README.md
+++ b/README.md
@@ -16,8 +16,9 @@ Installation & Usage (Max OS X 10.8)
 4. Open **System Preferences**, then select **Sharing**. Select **Internet Sharing**, then set "Share your connection from:" to **Ethernet**, and check off **WiFi** in the "To computers using" box. Finally, check off **Internet Sharing** and click **Start** at the prompt.
 5. Open **Terminal** (in your Applications folder under *Utilities*), and navigate to the location you placed **relaymyhome** -- if you put it in **Documents**, then in *Terminal* type: **cd ~/Documents**
 6. **IMPORTANT**: At this point, you need to know which interface your WiFi is on. For most modern Apple laptops, this will be en1 (if your laptop has a wired Ethernet port as well as WiFi) or en0 (if you have a WiFi-only laptop, such as the MacBook Air). This guide does not cover the specifics of how to find this interface, since it differs by model of Mac.
-7. (Note for this step: we assume your WiFi is on interface en1. If it is on en0 which will be common for the MacBook Air or any Mac without a wired network port, use en0 instead of en1 wherever you see it in this step) -- Now type **./relaymyhome en1** and you should see the script do its thing. If you get an error that stops the script, something went wrong. The script takes about 20-30 minutes to run, after which you should have a list full of StreetPass hits on your 3DS.
-8. After at least eight (8) hours have passed, repeat steps 3-7 to get a new set of StreetPass hits. You can also run the script a second time immediately, but you will likely only get a few hits on the second run.
+7. If this is the first time you are running the script, in Terminal enter the command: **chmod +x relaymyhome**
+8. (Note for this step: we assume your WiFi is on interface en1. If it is on en0 which will be common for the MacBook Air or any Mac without a wired network port, use en0 instead of en1 wherever you see it in this step) -- Now type **./relaymyhome en1** and you should see the script do its thing. If you get an error that stops the script, something went wrong. The script takes about 20-30 minutes to run, after which you should have a list full of StreetPass hits on your 3DS.
+9. After at least eight (8) hours have passed, repeat steps 3-8 to get a new set of StreetPass hits. You can also run the script a second time immediately, but you will likely only get a few hits on the second run.
 
 Credits
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