See iTunes music track in the Dock in OS X

March 21, 2013, 4:21 PM — Here's how you can see a popup in the Dock when iTunes starts playing a new song.

1. Open a terminal window.

2. Type in the following command, then hit Enter.

defaults write com.apple.dock notification-always-show-image -bool TRUE; killall Dock

3. You can deactivate it using these commands:

defaults delete com.apple.dock itunes-notifications
defaults delete com.apple.dock notification-always-show-image;killall Dock

For more, see the original article at the link below.

See the iTunes Track in the Dock | Amsys