Update the Mac warning in intro_installation.rst

A setting of 1024 here causes other issues such as VMware not being able to start Virtual Machines. Changing to just "unlimited" as the option resolves this

docsite/rst/intro_installation.rst

@@ -52,7 +52,7 @@ This includes Red Hat, Debian, CentOS, OS X, any of the BSDs, and so on.
 .. note::
 
     As of 2.0 ansible uses a few more file handles to manage its forks, OS X has a very low setting so if you want to use 15 or more forks
-    you'll need to raise the ulimit, like so ``sudo launchctl limit maxfiles 1024 unlimited``. Or just any time you see a "Too many open files" error.
+    you'll need to raise the ulimit, like so ``sudo launchctl limit maxfiles unlimited``. Or just any time you see a "Too many open files" error.
 
 
 .. warning::