Show a “Now Playing” iTunes Notification in the OS X Dock
Using a defaults write command, the iTunes Dock icon can be set to display a “Now Playing” song and artist pop-up that transitions in and out and music starts. It’s a nice addition, particularly if you’re playing songs from a shared network playlist and have iTunes hidden in the background.
Enable the iTunes song & artist Dock icon popups
Open the Terminal in /Applications/Utilities/ and type the following:
defaults write com.apple.dock itunes-notifications -bool TRUE
Now kill the Dock to relaunch it:
Start playing a song in iTunes to see the notification appear, it’ll disappear automatically and then reappear briefly anytime a new song starts.
If you decide you don’t like the notification, disabling the iTunes song popup is just as easy:
defaults delete com.apple.dock itunes-notifications
You won’t need to relaunch iTunes, but you will need to kill the Dock again.
This only works in Mac OS X 10.7 Lion, if you try it in prior versions nothing happens. The tip comes from Keir Thomas, author of Mac Kung Fu, we found it by way of TheNextWeb.