diff --git a/README.md b/README.md
index a961169..e1c4f65 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@
 ```
 (thanks to SkarDude)
 
+(for macs) - <httpMad> so tty.usbmodem123451 does not work for bot.php have to use cu.usbmodem123451
+
 the device cannot be busy when running this script, i.e. kill your screen sessions!
 
 If your badge is generating short hashes this will automagically fix that.