[solved] Magic __destruct - Win vs. Mac

[eluser]CroNiX[/eluser]
Not sure about that problem, sorry, but I do know that the mac's version of PHP crypt() does not make use of md5(), which is technically a good thing, except when you are working with legacy code and don't have a choice and need md5 w/crypt(). Took a long time troubleshooting that one when I was using an auth system that used crypt w/md5 to hash passwords. The passwords weren't transferable due to this limitation.

Actually, your first problem is probably because it can't find that file, so it's outputting the error which messes with the headers being sent already.
Make sure /Applications/XAMPP/xamppfiles/htdocs/icf/codeigniter/core/Exceptions.php exists, has proper file and user/group permissions.