The 1.3.1 version of Milkshake for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program belongs to Audio & Video Tools. This free Mac app is an intellectual property of Dean Liu. We recommend checking the downloaded files with any free antivirus.
From the developer:
Milkshake is a player for Pandora. In order to use this app, you will need a Pandora account. It features minimalist UI that focuses on album art, shortcuts, cross fading, scrubbing, and easy navigation. The player is kept as front window all the time.
You may want to check out more software for Mac, such as Happy Burger Days mini, which might be similar to Milkshake.