This blog post explains how to disable the notification box with dark gray (black) background in the top right corner of the Mac OS X screen whenever somebody sends you a Skype chat message. The instructions given here have been verified and found working on Mac OS X 10.5.8 (Leopard), but they may not work in Snow Leopard (10.6).
One of the following solutions should work. Please try both.
- You will not find the setting in Skype's preferences. To disable these notifications, you have to modify your Growl preferences. In the Apple menu (Apple logo in the top left corner of the screen), select System Preferences / Other / Growl / Application / Skype / Configure / Notifications. (If you don't have the item named Growl above, then that's probably because you are using Snow Leopard, and this howto cannot help you.) Here you can change the settings for various notification types. Disable Contact is typing and all containing message received.
- (boakananda's solution) In Skype 5.0 for the Mac, the default setting is to have visual popup notifications, which are built into Skype and independent of whether Growl is installed or not. (You have the option of having Growl control the notifications, but the default is to have the notifications built-in from Skype). If you want to get rid of the notifications, go to the Skype menu, Preferences, click on the Notifications button, and select the check box Disable all visual notifications.