I recently switched to a mac and am currently looking for a Nagios client that displays the Nagios notifications & alerts.
There are quite a few apps for the iPhone and iPad, but I haven't found anything for the Mac yet.

Under Windows I simply used the Nagios Notification Checker plugin for Firefox, but I would prefer a native app, which notifies via Growl or sits in the topbar and notifies any alerts.

Is there anything like that available for the mac?