diff --git a/res/welcome.txt b/res/welcome.txt
index 13096863d..6cf472a4a 100644
--- a/res/welcome.txt
+++ b/res/welcome.txt
@@ -1,3 +1,12 @@
 Welcome to the qTox for OS X internal nightly installer!
 
 Please report all bugs to https://support.libtoxcore.so
+
+#########################################################
+##         WARNING: Install me to your user ONLY       ##
+##                                                     ##
+##     Failure to do so WILL break automatic updating  ##
+##        and you WILL be left with and old and        ##
+##          potentially broken qTox install!           ##
+##                                                     ##
+#########################################################