All you have to do is open Terminal and type in the following command: Your dock will disappear for a few seconds and reappear up with a new translucent look – so much that you’ll be able to see your wallpaper right through it.
To reverse this and get the original dock back, enter this command in Terminal: As you can see from the above image, it’s not a huge difference, but enough that it’s noticeable. Which look do you prefer?