Hey Guys, I just downloaded and installed Growl notifications for my Mac. I have a few questions. 1. Without Growl, does OSX not do system notifications? 2. Really, what is Growl? I don't know, can someone just explain to me what system notifications are and what Growl is doing differently? For instance, without Growl my firefox extension, Gmail Notifier, doesn't pop up a new mail notification. With Growl it does. Does this mean OSX doesn't do system notifications normally?